Bump io.micrometer:micrometer-tracing-bom from 1.3.8 to 1.3.9

Bumps [io.micrometer:micrometer-tracing-bom](https://github.com/micrometer-metrics/tracing) from 1.3.8 to 1.3.9.
- [Release notes](https://github.com/micrometer-metrics/tracing/releases)
- [Commits](micrometer-metrics/tracing@v1.3.8...v1.3.9)

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

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

Author: dependabot[bot]

build.gradle

@@ -93,7 +93,7 @@ ext {
     lettuceVersion = '6.3.2.RELEASE'
     log4jVersion = '2.23.1'
     mailVersion = '2.0.3'
-    micrometerTracingVersion = '1.3.8'
+    micrometerTracingVersion = '1.3.9'
     micrometerVersion = '1.13.11'
     mockitoVersion = '5.11.0'
     mongoDriverVersion = '5.0.1'