Fix build README badge #29

Job	Run time
pytester (3.8, ubuntu-latest, local)	3m 10s
pytester (3.8, ubuntu-latest, db)	1m 12s
pytester (3.8, macOS-latest, local)	3m 52s
pytester (3.8, windows-latest, local)	3m 50s
pytester (3.8, windows-latest, db)	3m 25s
pytester (3.9, ubuntu-latest, local)	3m 16s
pytester (3.9, ubuntu-latest, db)	1m 20s
pytester (3.9, macOS-latest, local)	3m 24s
pytester (3.9, windows-latest, local)	4m 32s
pytester (3.9, windows-latest, db)	3m 52s
pytester (3.10, ubuntu-latest, local)	3m 20s
pytester (3.10, ubuntu-latest, db)	1m 22s
pytester (3.10, macOS-latest, local)	3m 22s
pytester (3.10, windows-latest, local)	3m 54s
pytester (3.10, windows-latest, db)	4m 31s
pytester (3.11, ubuntu-latest, local)	3m 16s
pytester (3.11, ubuntu-latest, db)	1m 15s
pytester (3.11, macOS-latest, local)	3m 23s
pytester (3.11, windows-latest, local)	4m 26s
pytester (3.11, windows-latest, db)	3m 16s
pytester (3.12, ubuntu-latest, local)	3m 20s
pytester (3.12, ubuntu-latest, db)	1m 37s
pytester (3.12, macOS-latest, local)	3m 20s
pytester (3.12, windows-latest, local)	4m 3s
pytester (3.12, windows-latest, db)	4m 34s
testing-guardian	1s
	1h 20m 53s

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