README: update jenkins job badges

[scpeters]

🦟 Bug fix

Fixes windows jenkins job badge in README to use colcon-based job name

Summary

Similar to #417 for main

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 #418 (04ab0f2) into main (e4a06a7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #418   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files          49       49           
  Lines        4396     4396           
=======================================
  Hits         4389     4389           
  Misses          7        7           

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