Fix default joint limits

[scpeters]

🦟 Bug fix

Follow up to gazebosim/sdformat#1112

Summary

Use updated default joint limits

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.

[ahcorde]

One test it's failing https://github.com/gazebosim/gz-mujoco/runs/7887897191?check_suite_focus=true

Do we need a release?

[codecov[bot]]

Codecov Report

Merging #106 (9d8fafa) into main (01d2105) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #106   +/-   ##
=======================================
  Coverage   95.20%   95.20%           
=======================================
  Files          24       24           
  Lines        1168     1168           
=======================================
  Hits         1112     1112           
  Misses         56       56           

Impacted Files	Coverage Δ
...sdformat_mjcf/sdformat_to_mjcf/converters/joint.py	97.56% <100.00%> (ø)

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