deps/gha: bump docker/metadata-action from 5.4.0 to 5.5.0

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](9dc751fe24...dbef88086f)

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

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

.github/workflows/container-build.yml

@@ -84,7 +84,7 @@ jobs:
       # Compute metadata
       - name: Extract metadata
         id: meta
-        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e # v5.4.0
+        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
         with:
           images: bunkerity/${{ inputs.IMAGE }}
       # Build cached image

.github/workflows/linux-build.yml

@@ -135,7 +135,7 @@ jobs:
       - name: Extract metadata
         if: inputs.TEST == true
         id: meta
-        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e # v5.4.0
+        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
         with:
           images: ghcr.io/bunkerity/${{ inputs.LINUX }}-tests:${{ inputs.RELEASE }}
       - name: Build test image

.github/workflows/push-docker.yml

@@ -63,7 +63,7 @@ jobs:
       # Compute metadata
       - name: Extract metadata
         id: meta
-        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e # v5.4.0
+        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
         with:
           images: bunkerity/${{ inputs.IMAGE }}
       # Build and push