Update CI badges in README

[iche033]

🦟 Bug fix

Summary

focal -> jammy ign -> gz

Checklist

• [x] Signed all commits for DCO
• [ ] Added tests
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if the library has them)
• [ ] codecheck passed (See contributing)
• [ ] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

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:

Comparison is base (4f32cf4) 97.67% compared to head (8104006) 97.67%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## gz-msgs10 #412 +/- ## ========================================== Coverage 97.67% 97.67% ========================================== Files 27 27 Lines 1163 1163 ========================================== Hits 1136 1136 Misses 27 27 ```

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