Bump docker/login-action from 3 to 4 (#27)

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
...

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Author: dependabot[bot]

.github/workflows/docker-workstations.yml

@@ -15,7 +15,7 @@ jobs:
       # Login
       # https://github.com/marketplace/actions/docker-login
       - name: Login to GitHub container registry 🏭
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}

.github/workflows/podman-release.yml

@@ -285,7 +285,7 @@ jobs:
     needs: [scan]
     steps:
       - name: Login to GitHub container registry 🏭
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -301,7 +301,7 @@ jobs:
     needs: [scan]
     steps:
       - name: Login to Docker Hub registry 🏭
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           username: ${{ secrets.DOCKER_REGISTRY_USERNAME }}
           password: ${{ secrets.DOCKER_REGISTRY_PASSWORD }}