Bump io.micrometer:micrometer-registry-prometheus (#6192)

Bumps the micrometer group with 1 update: [io.micrometer:micrometer-registry-prometheus](https://github.com/micrometer-metrics/micrometer).


Updates `io.micrometer:micrometer-registry-prometheus` from 1.13.4 to 1.13.6
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.13.4...v1.13.6)

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

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

gradle/libs.versions.toml

@@ -64,7 +64,7 @@ logging-slf4japi = { module = "org.slf4j:slf4j-api", version = "2.0.16" }
 logging-logbackclassic = { module = "ch.qos.logback:logback-classic", version = "1.5.8" }
 logging-logstashlogbackencoder = { module = "net.logstash.logback:logstash-logback-encoder", version = "8.0" }
 
-metrics-micrometer-prometheus = { module = "io.micrometer:micrometer-registry-prometheus", version = "1.13.4" }
+metrics-micrometer-prometheus = { module = "io.micrometer:micrometer-registry-prometheus", version = "1.13.6" }
 metrics-prometheus-simpleclientcommon = { module = "io.prometheus:simpleclient_common", version.ref = "prometheus-version" }
 metrics-prometheus-simpleclienthotspot = { module = "io.prometheus:simpleclient_hotspot", version.ref = "prometheus-version" }