build

chore(deps): update docker/metadata-action digest to c299e40 #2098

Job	Run time
lint	10s
grab-imapfilter-latest	2s
build (latest=false suffix=-tag , imapfilter_spec=v2.8.3 )	1m 29s
build (latest=false suffix= , imapfilter_spec=master)	1m 31s
	3m 12s

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