deps: update dependency com.googlecode.maven-download-plugin:download-maven-plugin to v1.7.1

Author: renovate-bot

gapic-generator-java/pom.xml

@@ -129,7 +129,7 @@
       <plugin>
         <groupId>com.googlecode.maven-download-plugin</groupId>
         <artifactId>download-maven-plugin</artifactId>
-        <version>1.6.8</version>
+        <version>1.7.1</version>
         <executions>
           <execution>
             <id>download-metadata-proto</id>

showcase/gapic-showcase/pom.xml

@@ -54,7 +54,7 @@
       <plugin>
         <groupId>com.googlecode.maven-download-plugin</groupId>
         <artifactId>download-maven-plugin</artifactId>
-        <version>1.6.8</version>
+        <version>1.7.1</version>
         <executions>
           <execution>
             <id>download-compliance-suite</id>