action: bump codecov-action to v4

[adamqqqplay]

Relevant Issue (if applicable)

If there are Issues related to this PullRequest, please list it.

Details

To solve the problem of CI failure.

Types of changes

What types of changes does your PullRequest introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

Go over all the following points, and put an x in all the boxes that apply.

• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.52%. Comparing base (e926d2f) to head (d8debb8).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1571      +/-   ##
==========================================
+ Coverage   61.23%   61.52%   +0.28%     
==========================================
  Files         144      144              
  Lines       47100    46616     -484     
  Branches    44602    44602              
==========================================
- Hits        28843    28680     -163     
+ Misses      16778    16452     -326     
- Partials     1479     1484       +5     

see 18 files with indirect coverage changes

[imeoer]

LGTM, thanks!