CI: unstable Codecov Report

[Anilople]

• [x] I have checked the discussions
• [x] I have searched the issues of this repository and believe that this is not a duplicate.
• [x] I have checked the FAQ of this repository and believe that this is not a duplicate.

Describe the bug

Sometimes in Codecov Report, coverage will decrease even change non .java file.

To Reproduce

Change an index.html like https://github.com/apolloconfig/apollo/pull/4908

Expected behavior Coverage of project should be same as previous commit.

Screenshots

https://github.com/apolloconfig/apollo/pull/4908#issuecomment-1599772570

https://github.com/apolloconfig/apollo/pull/4908/checks?check_run_id=14705443703

[nobodyiam]

I think it's because it also includes the html code to the coverage?

[mghio]

See Unexpected Coverage Changes.