Update CI badges in README

[iche033]

🦟 Bug fix

Summary

focal -> jammy
ign -> gz
main -> launch7

Checklist

• 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]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (03fac5b) 58.62% compared to head (54cec9a) 58.62%.

Additional details and impacted files

@@             Coverage Diff             @@
##           gz-launch7     #239   +/-   ##
===========================================
  Coverage       58.62%   58.62%           
===========================================
  Files               3        3           
  Lines             423      423           
===========================================
  Hits              248      248           
  Misses            175      175           

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