micrometer-bom upgrade not included in generated tracing changelog

[shakuzen]

See tracing 1.13.12 milestone, for example. The generated changelog was:

## :lady_beetle: Bug Fixes

- Add extra checks for baggage header parsing [#1010](https://github.com/micrometer-metrics/tracing/pull/1010)

## :heart: Contributors

Thank you to all the contributors who worked on this release:
@songxiaosheng

It should have a dependency upgrade entry in the changelog for the micrometer-bom upgrade.