chore(deps): bump docker/metadata-action from 3 to 4 (#9707)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 3 to 4.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](https://github.com/docker/metadata-action/compare/v3...v4)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker-release.yml

@@ -50,7 +50,7 @@ jobs:
 
       - name: Extract Docker metadata (ordinary version)
         id: meta-ordinary
-        uses: docker/metadata-action@v3
+        uses: docker/metadata-action@v4
         with:
           images: ${{ secrets.DOCKER_USERNAME }}/rsshub
           tags: |
@@ -73,7 +73,7 @@ jobs:
 
       - name: Extract Docker metadata (Chromium-bundled version)
         id: meta-chromium-bundled
-        uses: docker/metadata-action@v3
+        uses: docker/metadata-action@v4
         with:
           images: ${{ secrets.DOCKER_USERNAME }}/rsshub
           tags: |

.github/workflows/docker-test.yml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v3
+        uses: docker/metadata-action@v4
         with:
           images: rsshub
           flavor: latest=true