Prepapre for 13.2.0 prerelease

[iche033]

🎈 Release

Preparation for 13.2.0~pre1 release.

Comparison to 13.1.0: https://github.com/gazebosim/gz-transport/compare/gz-transport13_13.1.0...prep_13.2.0pre1

Needed by <PR(s)>

Checklist

• [x] Asked team if this is a good time for a release
• [x] 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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.85%. Comparing base (eac2e69) to head (04a2c88). Report is 9 commits behind head on gz-transport13.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## gz-transport13 #488 +/- ## ================================================== + Coverage 87.69% 87.85% +0.16% ================================================== Files 59 59 Lines 5704 5706 +2 ================================================== + Hits 5002 5013 +11 + Misses 702 693 -9 ```

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