Prepare for 6.0.2 release

[caguero]

🎈 Release

Preparation for 6.0.2 release.

Comparison to 6.0.1: gz-common6_6.0.1...gz-common6

Checklist

• Asked team if this is a good time for a release
• There are no changes to be ported from the previous major version
• No PRs targeted at this major version are close to getting in
• Bumped minor for new features, patch for bug fixes
• Updated changelog
• Updated migration guide (as needed)
• Link to PR updating dependency versions in appropriate repository in gazebo-release (as needed):

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (gz-common6@be28fbd). Learn more about missing BASE report.

Additional details and impacted files

@@              Coverage Diff              @@
##             gz-common6     #663   +/-   ##
=============================================
  Coverage              ?   84.86%           
=============================================
  Files                 ?       78           
  Lines                 ?    10141           
  Branches              ?        0           
=============================================
  Hits                  ?     8606           
  Misses                ?     1535           
  Partials              ?        0           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.