Remove "Experimental" notices on Update APIs #2421

Job	Run time
build-and-test (ubuntu-latest, oldstable)	17m 17s
cloud-test (oldstable)	26s
build-and-test (ubuntu-latest, stable)	25m 48s
cloud-test (stable)	23s
build-and-test (macos-intel, oldstable)	18m 0s
build-and-test (macos-intel, stable)	18m 9s
build-and-test (macos-arm, oldstable)	17m 21s
build-and-test (macos-arm, stable)	17m 12s
build-and-test (windows-latest, oldstable)	19m 29s
build-and-test (windows-latest, stable)	20m 45s
features-test / test	2m 4s
	2h 36m 54s

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