Fix clover's format name in README

[szepeviktor]

From https://github.com/coverallsapp/coverage-reporter/pull/102#discussion_r1379146124

:zap: Summary

I thought it was the program's name. Sorry.

props. @jrfnl

[coveralls-official[bot]]

Pull Request Test Coverage Report for Build 6723668098

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.719%

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Totals
Change from base Build 6721884478:	0.0%
Covered Lines:	940
Relevant Lines:	1003

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💛 - Coveralls

[jrfnl]

@afinetooth Could this please be merged so the incorrect information is gone ?