Merge pull request #3662 from albers/completion-bundle--fetch-digests

bash completion for `docker-compose bundle --fetch-digests`

contrib/completion/bash/docker-compose

@@ -117,7 +117,7 @@ _docker_compose_bundle() {
 			;;
 	esac
 
-	COMPREPLY=( $( compgen -W "--help --output -o" -- "$cur" ) )
+	COMPREPLY=( $( compgen -W "--fetch-digests --help --output -o" -- "$cur" ) )
 }