Prepare for 6.6.1 Release

[azeey]

🎈 Release

Preparation for 6.6.1 release.

Comparison to 6.6.0: ignition-rendering6_6.6.0...ign-rendering6

Needed by <PR(s)>

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.

[iche033]

Suggested change

	* [Pull request #864](https://github.com/gazebosim/gz-rendering/pull/#864)
	* [Pull request #864](https://github.com/gazebosim/gz-rendering/pull/864)

[azeey]

Done in 4747722

[azeey]

It looks like macOS has 33 failures on Monterey, but 0 on Big Sur.

[scpeters]

It looks like macOS has 33 failures on Monterey, but 0 on Big Sur.

I can't tell what the problem was from the console log; it looks like those tests have been failing for a while on gz-rendering6 CI, since it often seems to run on the monterey machine:

• https://build.osrfoundation.org/view/ign-fortress/job/ignition_rendering-ci-ign-rendering6-homebrew-amd64/

I would just go ahead with the release I think

[azeey]

I also can't figure out why there are 20 warnings on windows. Going ahead with the release.