fix: lcov absolute paths in Windows

[mrexox]

Relates to https://github.com/coverallsapp/github-action/issues/169

:zap: Summary

Tries replacing current directory in the name with both variants: slashes and backslashes (important for Windows)

[coveralls-official[bot]]

Pull Request Test Coverage Report for Build 4809198947

• 6 of 6 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.06%) to 90.566%

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Totals
Change from base Build 4808924773:	0.06%
Covered Lines:	720
Relevant Lines:	795

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💛 - Coveralls