Bump io.micrometer:micrometer-bom from 1.15.0-M2 to 1.15.0-SNAPSHOT (#9860)

Bumps [io.micrometer:micrometer-bom](https://github.com/micrometer-metrics/micrometer) from 1.15.0-M2 to 1.15.0-SNAPSHOT.
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](https://github.com/micrometer-metrics/micrometer/commits)

---
updated-dependencies:
- dependency-name: io.micrometer:micrometer-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -93,7 +93,7 @@ ext {
     log4jVersion = '2.24.3'
     mailVersion = '2.0.3'
     micrometerTracingVersion = '1.5.0-M2'
-    micrometerVersion = '1.15.0-M2'
+    micrometerVersion = '1.15.0-SNAPSHOT'
     mockitoVersion = '5.15.2'
     mongoDriverVersion = '5.3.1'
     mysqlVersion = '9.1.0'