ci(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
codecov/codecov-action	action	pinDigest	-> ab904c4
xd009642/tarpaulin	container	pinDigest	-> 7b70cf1

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.21%. Comparing base (f4d6d0b) to head (d48c627).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #76   +/-   ##
=======================================
  Coverage   68.21%   68.21%           
=======================================
  Files          39       39           
  Lines        1677     1677           
=======================================
  Hits         1144     1144           
  Misses        533      533           

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