Fix setUpdateHandler docstring #2068

Job	Run time
cloud-test (oldstable)	1m 4s
cloud-test (oldstable)	1m 4s
build-and-test (ubuntu-latest, oldstable)	17m 30s
build-and-test (ubuntu-latest, oldstable)	17m 30s
build-and-test (ubuntu-latest, stable)	25m 58s
build-and-test (ubuntu-latest, stable)	3m 1s
cloud-test (stable)	1m 6s
cloud-test (stable)	1m 6s
build-and-test (macos-intel, oldstable)	21m 2s
build-and-test (macos-intel, oldstable)	21m 2s
build-and-test (macos-intel, stable)	19m 14s
build-and-test (macos-intel, stable)	19m 14s
build-and-test (macos-arm, oldstable)	17m 59s
build-and-test (macos-arm, oldstable)	17m 59s
build-and-test (macos-arm, stable)	17m 41s
build-and-test (macos-arm, stable)	17m 41s
build-and-test (windows-latest, oldstable)	20m 3s
build-and-test (windows-latest, oldstable)	20m 3s
build-and-test (windows-latest, stable)	21m 27s
build-and-test (windows-latest, stable)	21m 27s
features-test / test	1m 57s
features-test / test	1m 57s
	5h 7m 5s

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