Test

Update to latest nightly, use new index URL (#71) #155

Job	Run time
test (macos-15, last_green)	2m 0s
test (ubuntu-latest, latest)	53s
test (ubuntu-latest, last_rc)	1m 32s
test (macos-15, 8.x)	1m 33s
test (ubuntu-latest, 8.x)	50s
test (macos-15, latest)	1m 47s
test (macos-15, last_rc)	1m 33s
test (ubuntu-latest, last_green)	1m 32s
	11m 40s

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