Fix docker image pushing issue

[amitsaha]

Failing with:

https://github.com/amitsaha/gitbackup/actions/runs/26780455663/job/78943136571

[amitsaha]

/usr/bin/docker buildx build --iidfile /home/runner/work/_temp/docker-actions-toolkit-SwtFSU/build-iidfile-d0baac5ab5.txt --label org.opencontainers.image.created=2026-06-02T19:55:25.285Z --label org.opencontainers.image.description=Tool to backup your Bitbucket, GitHub, GitLab and Forgejo repositories --label org.opencontainers.image.licenses=MIT --label org.opencontainers.image.revision=bf65a4c4f85f23a4bc9ea84eadf3895413a81670 --label org.opencontainers.image.source=https://github.com/amitsaha/gitbackup --label org.opencontainers.image.title=gitbackup --label org.opencontainers.image.url=https://github.com/amitsaha/gitbackup --label org.opencontainers.image.version= --attest type=provenance,disabled=true --metadata-file /home/runner/work/_temp/docker-actions-toolkit-SwtFSU/build-metadata-4c150b0bea.json --push .
ERROR: failed to build: tag is needed when pushing to registry
Reference
Check build summary support
Error: buildx failed with: ERROR: failed to build: tag is needed when pushing to registry```

[amitsaha]

Fixed. Will need better tagging next with the release.

[amitsaha]

Ah apparently it all worked:

v1.3.1: Pulling from amitsaha/gitbackup
e1de8f396549: Pull complete
629f9d679b93: Pull complete
e072b36b3be8: Pull complete
Digest: sha256:9123c5b42d00c38a5160f831fe1fb2ce70bfaa24ffff1dbaf8207b7dfc491b7b
Status: Downloaded newer image for ghcr.io/amitsaha/gitbackup:v1.3.1```