Bump docker/login-action from 3 to 4 in /.github/workflows

Bumps [docker/login-action](https://github.com/docker/login-action) from 3 to 4.
- [Release notes](https://github.com/docker/login-action/releases)
- [Commits](docker/login-action@v3...v4)

---
updated-dependencies:
- dependency-name: docker/login-action
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/docker.yml

@@ -15,7 +15,7 @@ jobs:
               uses: actions/checkout@v6
 
             - name: Log in to Docker Hub
-              uses: docker/login-action@v3
+              uses: docker/login-action@v4
               with:
                 username: ${{ secrets.DOCKERHUB_USERNAME }}
                 password: ${{ secrets.DOCKERHUB_TOKEN }}