[Backport 1.7.latest] be less explicit in source regex

[github-actions]

Backport 7e72cac from #9936.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.64%. Comparing base (ffa1a38) to head (93f803e).

Additional details and impacted files

@@             Coverage Diff             @@
##           1.7.latest    #9937   +/-   ##
===========================================
  Coverage       86.64%   86.64%           
===========================================
  Files             179      179           
  Lines           26662    26662           
===========================================
  Hits            23102    23102           
  Misses           3560     3560           

Flag	Coverage Δ
integration	83.47% <ø> (ø)
unit	65.03% <ø> (ø)

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