Bump micrometer.version from 1.15.2 to 1.15.5

Bumps `micrometer.version` from 1.15.2 to 1.15.5.

Updates `io.micrometer:micrometer-core` from 1.15.2 to 1.15.5
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.15.2...v1.15.5)

Updates `io.micrometer:micrometer-observation` from 1.15.2 to 1.15.5
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.15.2...v1.15.5)

Updates `io.micrometer:micrometer-registry-prometheus` from 1.15.2 to 1.15.5
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.15.2...v1.15.5)

---
updated-dependencies:
- dependency-name: io.micrometer:micrometer-core
  dependency-version: 1.15.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.micrometer:micrometer-observation
  dependency-version: 1.15.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.micrometer:micrometer-registry-prometheus
  dependency-version: 1.15.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -80,7 +80,7 @@
     <hc.animal-sniffer.signature.ignores>javax.net.ssl.SSLEngine,javax.net.ssl.SSLParameters,java.nio.ByteBuffer,java.nio.CharBuffer,jdk.net.ExtendedSocketOptions,jdk.net.Sockets</hc.animal-sniffer.signature.ignores>
     <commons.compress.version>1.28.0</commons.compress.version>
     <zstd.jni.version>1.5.7-4</zstd.jni.version>
-    <micrometer.version>1.15.2</micrometer.version>
+    <micrometer.version>1.15.5</micrometer.version>
     <micrometer.tracing.version>1.5.2</micrometer.tracing.version>
     <otel.version>1.55.0</otel.version>     <!-- already used elsewhere -->
     <commons-compress.version>1.26.2</commons-compress.version>