Fix zip signature to mention closure input type (#12216) #15

Job	Run time
std-lib-and-python-virtualenv (ubuntu-20.04, py)	4m 3s
std-lib-and-python-virtualenv (macos-latest, py)	7m 14s
fmt-clippy (windows-latest, default)	7m 31s
std-lib-and-python-virtualenv (windows-latest, py)	9m 2s
plugins (windows-latest)	8m 51s
fmt-clippy (macos-latest, default)	4m 48s
plugins (macos-latest)	4m 54s
fmt-clippy (ubuntu-20.04, default)	2m 47s
tests (windows-latest, default)	11m 17s
plugins (ubuntu-20.04)	2m 10s
fmt-clippy (ubuntu-20.04, dataframe)	3m 13s
tests (macos-latest, default)	6m 23s
tests (ubuntu-20.04, default)	5m 12s
tests (ubuntu-20.04, dataframe)	6m 33s
	1h 23m 58s

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