Fix unresolved directives in generated documentation

Closes gh-16452

Author: snicoll

spring-boot-project/spring-boot-docs/pom.xml

@@ -1419,6 +1419,7 @@
 								<spring-docs-version>${spring.version}</spring-docs-version>
 								<spring-boot-version>${revision}</spring-boot-version>
 								<sources-root>${project.basedir}/src/</sources-root>
+								<generated-resources-root>${project.basedir}/target/generated-resources</generated-resources-root>
 							</attributes>
 						</configuration>
 						<executions>

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/application-properties.adoc

@@ -17,60 +17,60 @@ should not consider this an exhaustive list. Also, you can define your own prope
 
 === Core properties
 
-include::../../../target/generated-resources/config-docs/core.adoc[]
+include::{generated-resources-root}/config-docs/core.adoc[]
 
 === Cache properties
 
-include::../../../target/generated-resources/config-docs/cache.adoc[]
+include::{generated-resources-root}/config-docs/cache.adoc[]
 
 === Mail properties
 
-include::../../../target/generated-resources/config-docs/mail.adoc[]
+include::{generated-resources-root}/config-docs/mail.adoc[]
 
 === JSON properties
 
-include::../../../target/generated-resources/config-docs/json.adoc[]
+include::{generated-resources-root}/config-docs/json.adoc[]
 
 === Data properties
 
-include::../../../target/generated-resources/config-docs/data.adoc[]
+include::{generated-resources-root}/config-docs/data.adoc[]
 
 === Transaction properties
 
-include::../../../target/generated-resources/config-docs/transaction.adoc[]
+include::{generated-resources-root}/config-docs/transaction.adoc[]
 
 === Data migration properties
 
-include::../../../target/generated-resources/config-docs/data-migration.adoc[]
+include::{generated-resources-root}/config-docs/data-migration.adoc[]
 
 === Integration properties
 
-include::../../../target/generated-resources/config-docs/integration.adoc[]
+include::{generated-resources-root}/config-docs/integration.adoc[]
 
 === Web properties
 
-include::../../../target/generated-resources/config-docs/web.adoc[]
+include::{generated-resources-root}/config-docs/web.adoc[]
 
 === Templating properties
 
-include::../../../target/generated-resources/config-docs/templating.adoc[]
+include::{generated-resources-root}/config-docs/templating.adoc[]
 
 === Server properties
 
-include::../../../target/generated-resources/config-docs/server.adoc[]
+include::{generated-resources-root}/config-docs/server.adoc[]
 
 === Security properties
 
-include::../../../target/generated-resources/config-docs/security.adoc[]
+include::{generated-resources-root}/config-docs/security.adoc[]
 
 === Actuator properties
 
-include::../../../target/generated-resources/config-docs/actuator.adoc[]
+include::{generated-resources-root}/config-docs/actuator.adoc[]
 
 === Devtools properties
 
-include::../../../target/generated-resources/config-docs/devtools.adoc[]
+include::{generated-resources-root}/config-docs/devtools.adoc[]
 
 === Testing properties
 
-include::../../../target/generated-resources/config-docs/testing.adoc[]
+include::{generated-resources-root}/config-docs/testing.adoc[]

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/auto-configuration-classes.adoc

@@ -13,12 +13,12 @@ the `conditions` endpoint).
 === From the "`spring-boot-autoconfigure`" module
 The following auto-configuration classes are from the `spring-boot-autoconfigure` module:
 
-include::../../../target/generated-resources/auto-configuration-classes-spring-boot-autoconfigure.adoc[]
+include::{generated-resources-root}/auto-configuration-classes-spring-boot-autoconfigure.adoc[]
 
 
 
 [[auto-configuration-classes-from-actuator]]
 === From the "`spring-boot-actuator-autoconfigure`" module
 The following auto-configuration classes are from the `spring-boot-actuator-autoconfigure` module:
 
-include::../../../target/generated-resources/auto-configuration-classes-spring-boot-actuator-autoconfigure.adoc[]
+include::{generated-resources-root}/auto-configuration-classes-spring-boot-actuator-autoconfigure.adoc[]

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/dependency-versions.adoc

@@ -6,4 +6,4 @@ by Spring Boot in its CLI (Command Line Interface), Maven dependency management,
 Gradle plugin. When you declare a dependency on one of these artifacts without declaring
 a version, the version listed in the table is used.
 
-include::../../../target/generated-resources/effective-pom.adoc[]
+include::{generated-resources-root}/effective-pom.adoc[]

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/test-auto-configuration.adoc

@@ -5,4 +5,4 @@
 The following table lists the various `@…Test` annotations that can be used to test
 slices of your application and the auto-configuration that they import by default:
 
-include::../../../target/generated-resources/test-slice-auto-configuration.adoc[]
+include::{generated-resources-root}/test-slice-auto-configuration.adoc[]

spring-boot-project/spring-boot-docs/src/main/asciidoc/using-spring-boot.adoc

@@ -304,19 +304,19 @@ The following application starters are provided by Spring Boot under the
 `org.springframework.boot` group:
 
 .Spring Boot application starters
-include::../../../target/generated-resources/application-starters.adoc[]
+include::{generated-resources-root}/application-starters.adoc[]
 
 In addition to the application starters, the following starters can be used to add
 _<<production-ready-features.adoc#production-ready, production ready>>_ features:
 
 .Spring Boot production starters
-include::../../../target/generated-resources/production-starters.adoc[]
+include::{generated-resources-root}/production-starters.adoc[]
 
 Finally, Spring Boot also includes the following starters that can be used if you want to
 exclude or swap specific technical facets:
 
 .Spring Boot technical starters
-include::../../../target/generated-resources/technical-starters.adoc[]
+include::{generated-resources-root}/technical-starters.adoc[]
 
 TIP: For a list of additional community contributed starters, see the
 {github-master-code}/spring-boot-project/spring-boot-starters/README.adoc[README file] in