Update README to use new Gitlab pipeline URL

[Frost45]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.55%. Comparing base (b350eb0) to head (6293ff0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #779      +/-   ##
==========================================
- Coverage   95.40%   93.55%   -1.85%     
==========================================
  Files          29       29              
  Lines        3676     3676              
==========================================
- Hits         3507     3439      -68     
- Misses        169      237      +68     

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