Add workflow to label pull requests

[klane]

No description provided.

[codecov]

Codecov Report

Merging #88 (58a2335) into main (db3f4a9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #88   +/-   ##
=======================================
  Coverage   18.48%   18.48%           
=======================================
  Files           7        7           
  Lines         395      395           
=======================================
  Hits           73       73           
  Misses        322      322           

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