Bump coverage from 7.5.1 to 7.6.4 #4718

Job	Run time
pytester (ubuntu-22.04, 3.10, latest, core)	13m 51s
pytester (ubuntu-22.04, 3.10, latest, ops)	23m 37s
pytester (ubuntu-22.04, 3.10, nightly, core)	15m 23s
pytester (ubuntu-22.04, 3.10, nightly, ops)	24m 11s
pytester (macOS-14, 3.10, latest, core)	8m 52s
pytester (macOS-14, 3.10, latest, ops)	16m 33s
pytester (macOS-14, 3.10, nightly, core)	8m 59s
pytester (macOS-14, 3.10, nightly, ops)	16m 54s
pytester (windows-2022, 3.10, latest, core)	25m 39s
pytester (windows-2022, 3.10, nightly, core)	24m 2s
pytester (ubuntu-22.04, 3.11, latest)	25m 4s
pytester (ubuntu-22.04, 3.12, latest)	29m 9s
testing-guardian	1s
	3h 52m 15s

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