Upgrade to Micrometer 1.15.0-RC1

Closes gh-1180

Author: bclozel

platform/build.gradle

@@ -10,8 +10,8 @@ dependencies {
 	api(platform("org.springframework:spring-framework-bom:${springFrameworkVersion}"))
 	api(platform("com.fasterxml.jackson:jackson-bom:2.18.3"))
 	api(platform("io.projectreactor:reactor-bom:2024.0.4"))
-	api(platform("io.micrometer:micrometer-bom:1.15.0-M3"))
-	api(platform("io.micrometer:micrometer-tracing-bom:1.5.0-M3"))
+	api(platform("io.micrometer:micrometer-bom:1.15.0-RC1"))
+	api(platform("io.micrometer:micrometer-tracing-bom:1.5.0-RC1"))
 	api(platform("org.springframework.data:spring-data-bom:2025.0.0-M2"))
 	api(platform("org.springframework.security:spring-security-bom:6.5.0-M3"))
 	api(platform("com.querydsl:querydsl-bom:5.1.0"))