Use informational mode

[EarlMilktea]

Make codecov ignore coverage changes.

[codecov[bot]]

Codecov Report

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

Project coverage is 71.77%. Comparing base (dd15e5d) to head (5033eef).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #152      +/-   ##
==========================================
+ Coverage   71.75%   71.77%   +0.01%     
==========================================
  Files          30       30              
  Lines        5353     5353              
==========================================
+ Hits         3841     3842       +1     
+ Misses       1512     1511       -1     

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[EarlMilktea]

MEMO: codecov success with negative coverage change