Update README.md and fixed links

[ahcorde]

🦟 Bug fix

Fixes gazebosim/gazebo_test_cases#437

Summary

Update documentation

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

Merging #103 (f80e6bd) into gz-utils2 (0a49361) will not change coverage.
The diff coverage is n/a.

❗ Current head f80e6bd differs from pull request most recent head d3296c9. Consider uploading reports for the commit d3296c9 to get more accurate results

@@            Coverage Diff             @@
##           gz-utils2     #103   +/-   ##
==========================================
  Coverage      79.45%   79.45%           
==========================================
  Files              8        8           
  Lines            331      331           
==========================================
  Hits             263      263           
  Misses            68       68