Bump coverage from 7.5.1 to 7.6.4 #4724

Job	Run time
pytester (ubuntu-22.04, 3.10, latest, core)	12m 12s
pytester (ubuntu-22.04, 3.10, latest, ops)	24m 16s
pytester (ubuntu-22.04, 3.10, nightly, core)	13m 2s
pytester (ubuntu-22.04, 3.10, nightly, ops)	24m 9s
pytester (macOS-14, 3.10, latest, core)	6m 39s
pytester (macOS-14, 3.10, latest, ops)	18m 59s
pytester (macOS-14, 3.10, nightly, core)	7m 9s
pytester (macOS-14, 3.10, nightly, ops)	20m 22s
pytester (windows-2022, 3.10, latest, core)	23m 30s
pytester (windows-2022, 3.10, nightly, core)	25m 0s
pytester (ubuntu-22.04, 3.11, latest)	24m 44s
pytester (ubuntu-22.04, 3.12, latest)	29m 53s
testing-guardian	1s
	3h 49m 56s

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