Update mergify.yml

[christophfroehlich]

Fix the text of mergify answering PRs to other branches than master:
#1316 (comment)

[saikishor]

Looks perfect!

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (3309c6d) 48.02% compared to head (137fad8) 48.01%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1317      +/-   ##
==========================================
- Coverage   48.02%   48.01%   -0.02%     
==========================================
  Files          41       41              
  Lines        3525     3526       +1     
  Branches     1912     1913       +1     
==========================================
  Hits         1693     1693              
  Misses        442      442              
- Partials     1390     1391       +1     

Flag	Coverage Δ
unittests	48.01% <60.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
hardware_interface/src/resource_manager.cpp	48.83% <60.00%> (-0.08%)	⬇️

[fmauch]

Seems fair :-)