Bump docker/metadata-action from 6.0.0 to 6.1.0 - #157

buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c apt-get update && apt-get upgrade && apt-get install gosu -y && apt-get install python3-pip -y && apt-get install git ca-certificates && apt-get install ffmpeg -y" did not complete successfully: exit code: 1