Bump the docker group across 1 directory with 3 updates

Bumps the docker group with 3 updates in the /.github/actions/setup-gear directory: [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action), [docker/build-push-action](https://github.com/docker/build-push-action) and [docker/login-action](https://github.com/docker/login-action).


Updates `docker/setup-buildx-action` from 3.3.0 to 3.4.0
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v3.3.0...v3.4.0)

Updates `docker/build-push-action` from 5.3.0 to 6.3.0
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.3.0...v6.3.0)

Updates `docker/login-action` from 3.1.0 to 3.2.0
- [Release notes](https://github.com/docker/login-action/releases)
- [Commits](docker/login-action@v3.1.0...v3.2.0)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: docker
- dependency-name: docker/login-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/actions/setup-gear/action.yaml

@@ -18,15 +18,15 @@ runs:
         sudo sed -i -e "1i runner:$(id -u):1" /etc/subuid
         sudo systemctl restart docker
         docker network create gear
-    - uses: docker/setup-buildx-action@v3.3.0
-    - uses: docker/build-push-action@v5.3.0
+    - uses: docker/setup-buildx-action@v3.4.0
+    - uses: docker/build-push-action@v6.3.0
       with:
         context: stack/gear/env/${{ inputs.devenv }}
         tags: stack/gear:${{ inputs.devenv }}
         load: true
         cache-from: type=gha,scope=stack/gear/${{ inputs.devenv }}
         cache-to: type=gha,mode=max,scope=stack/gear/${{ inputs.devenv }}
-    - uses: docker/login-action@v3.1.0
+    - uses: docker/login-action@v3.2.0
       with:
         registry: ghcr.io
         username: ${{ github.actor }}