release: Release opentelemetry-instrumentation-racecar 0.6.1 (was 0.6.0)

[otelbot-ruby-contrib]

This pull request prepares new gem releases for the following gems:

• opentelemetry-instrumentation-racecar 0.6.1 (was 0.6.0)

For each gem, this pull request modifies the gem version and provides an initial changelog entry based on conventional commit messages. You can edit these changes before merging, to release a different version or to alter the changelog text.

• To confirm this release, merge this pull request, ensuring the "release: pending" label is set. The release script will trigger automatically on merge.
• To abort this release, close this pull request without merging.

The generated changelog entries have been copied below:

---

opentelemetry-instrumentation-racecar

v0.6.1 / 2025-12-23

• FIXED: Use a unique consumer group in tests to fix racecar tests

[github-actions]

WARNING: An additional commit was added while this release PR was open.
You may need to add to the changelog, or close this PR and prepare a new one.

Commit link: 5f69383

Message:
chore(deps): update mysql:8.4.7 docker digest to 1f5b0ac (#1883)

[github-actions]

All releases completed successfully.

Successfully released opentelemetry-instrumentation-racecar 0.6.1