feat(release): install shell completions on brew install (DX-5783) #66

Job	Run time
plan	17s
build-global-artifacts	0s
build-local-artifacts (${{ join(matrix.targets, ', ') }})	0s
custom-publish-deb	0s
custom-publish-crates	0s
custom-publish-copr	0s
announce	0s
host	0s
custom-publish-docker	0s
	17s

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