Upgrade to Micrometer 1.15.0-RC1

Closes gh-34771

Author: bclozel

Diff for: framework-platform/framework-platform.gradle

@@ -8,7 +8,7 @@ javaPlatform {
 
 dependencies {
 	api(platform("com.fasterxml.jackson:jackson-bom:2.18.3"))
-	api(platform("io.micrometer:micrometer-bom:1.14.5"))
+	api(platform("io.micrometer:micrometer-bom:1.15.0-RC1"))
 	api(platform("io.netty:netty-bom:4.1.119.Final"))
 	api(platform("io.projectreactor:reactor-bom:2025.0.0-M1"))
 	api(platform("io.rsocket:rsocket-bom:1.1.5"))