Add YamlMime reference to codecov.yml

[ChrisPulman]

What kind of change does this PR introduce?

Update

What is the new behavior?

Updated to add missing ### YamlMime:ManagedReference

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.75%. Comparing base (40c4ab1) to head (10fa44f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4256   +/-   ##
=======================================
  Coverage   88.75%   88.75%           
=======================================
  Files         169      169           
  Lines        7522     7522           
  Branches     1241     1241           
=======================================
  Hits         6676     6676           
  Misses        672      672           
  Partials      174      174           

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.