update prerelease check to allow standard release #31819

Job	Run time
syntax	36s
formula audit	5m 39s
update-test (Ubuntu)	15s
tap syntax	7m 17s
update-test (macOS)	22s
cask audit	3m 0s
vendored gems	35s
test default formula (Ubuntu 22.04)	1m 43s
tests (online)	5m 55s
test default formula (Ubuntu 20.04)	3m 21s
test default formula (macOS 13 x86_64)	3m 22s
tests (generic OS)	3m 14s
test default formula (macOS 15 arm64)	1m 20s
tests (Ubuntu 24.04)	3m 6s
tests (Ubuntu 22.04)	3m 23s
tests (Ubuntu 20.04)	3m 14s
tests (macOS 13 x86_64)	10m 44s
tests (macOS 15 arm64)	5m 19s
	1h 2m 25s

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