Fix wrong test in codecov-action. #579

Job	Run time
mmg-debug / ci (ubuntu-20.04, on, off, on, off, int32_t)	47s
mmg-debug / ci (ubuntu-20.04, on, off, off, off, int32_t)	31s
mmg-debug / ci (ubuntu-20.04, off, off, on, off, int32_t)	48s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int32_t)	32s
mmg-debug / ci (macos-12, on, off, on, off, int32_t)	1m 43s
mmg-debug / ci (macos-12, on, off, off, off, int32_t)	1m 50s
mmg-debug / ci (macos-12, off, off, on, off, int32_t)	2m 22s
mmg-debug / ci (macos-12, off, off, off, off, int32_t)	1m 16s
mmg-debug / ci (ubuntu-20.04, off, off, off, on, int32_t)	1m 34s
mmg-debug / ci (macos-12, off, off, off, on, int32_t)	3m 42s
mmg-debug / ci (ubuntu-20.04, off, on, on, off, int32_t)	50s
mmg-debug / ci (macos-12, off, on, on, off, int32_t)	2m 15s
mmg-debug / ci (windows-2022, off, off, off, off, int32_t)	1m 57s
mmg-debug / ci (windows-2022, on, off, off, off, int32_t)	2m 3s
mmg-debug / ci (windows-2022, off, on, off, off, int32_t)	2m 3s
mmg-debug / ci (ubuntu-20.04, on, on, on, on, int64_t)	2m 39s
mmg-debug / ci (ubuntu-20.04, off, off, on, on, int64_t)	1m 55s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int64_t)	30s
mmg-debug / ci (macos-12, on, on, on, on, int64_t)	4m 14s
mmg-debug / ci (macos-12, off, off, off, off, int64_t)	1m 10s
mmg-debug / ci (windows-2022, on, on, off, off, int64_t)	1m 45s
mmg-debug / ci (windows-2022, off, off, off, off, int64_t)	1m 33s
mmg-debug / upload_coverage	28s
	38m 27s

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