Bump io.micrometer:micrometer-tracing-bom from 1.5.5 to 1.6.0 (#442)

Bumps [io.micrometer:micrometer-tracing-bom](https://github.com/micrometer-metrics/tracing) from 1.5.5 to 1.6.0.
- [Release notes](https://github.com/micrometer-metrics/tracing/releases)
- [Commits](micrometer-metrics/tracing@v1.5.5...v1.6.0)

---
updated-dependencies:
- dependency-name: io.micrometer:micrometer-tracing-bom
  dependency-version: 1.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 micrometer = "1.15.5"
-micrometerTracing = "1.5.5"
+micrometerTracing = "1.6.0"
 junit = "5.14.1"
 roaster = "2.22.3.Final" # last using jdk8
 handlebars = "4.3.1"