Fix COPR spec + point release-prepare at sync-manual-channels #39

Job	Run time
plan	16s
build-local-artifacts (${{ join(matrix.targets, ', ') }})	-1s
build-global-artifacts	0s
host	0s
custom-publish-deb	0s
custom-publish-copr	0s
custom-publish-crates	0s
announce	0s
custom-publish-docker	-1s
	14s

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