Bump docker/metadata-action from 4 to 5

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 4 to 5.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Upgrade guide](https://github.com/docker/metadata-action/blob/master/UPGRADE.md)
- [Commits](docker/metadata-action@v4...v5)

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

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

.github/workflows/build-base-image.yml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Generate tags for image
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           images: ghcr.io/${{ github.repository_owner }}/circ-baseimage
           # Generate tags for the image

.github/workflows/test-build.yml

@@ -154,7 +154,7 @@ jobs:
       # characters are escaped, and the repo owner string is lowercase.
       - name: Generate tags for base image
         id: baseimage-meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           images: ghcr.io/${{ github.repository_owner }}/circ-baseimage
           tags: |
@@ -165,7 +165,7 @@ jobs:
       # We are using docker/metadata-action here for the same reason as above.
       - name: Generate tag for latest
         id: baseimage-latest
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           images: ghcr.io/${{ github.repository_owner }}/circ-baseimage
           tags: |
@@ -354,7 +354,7 @@ jobs:
 
       - name: Generate tags for image
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           images: ghcr.io/${{ github.repository_owner }}/circ-${{ matrix.image }}
           tags: |