build(deps): bump docker/metadata-action from 5 to 6

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5 to 6.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](https://github.com/docker/metadata-action/compare/v5...v6)

---
updated-dependencies:
- dependency-name: docker/metadata-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/docker-build-static.yml

@@ -528,7 +528,7 @@ jobs:
 
       - name: Docker ${{ matrix.container }} Base meta
         id: meta-base
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           # list of Docker images to use as base name for tags
           images: |
@@ -556,7 +556,7 @@ jobs:
 
       - name: Docker ${{ matrix.container }}-rootless meta
         id: meta-rootless
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           # list of Docker images to use as base name for tags
           images: |
@@ -589,7 +589,7 @@ jobs:
 
       - name: Docker ${{ matrix.container }} meta
         id: meta-standard
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           # list of Docker images to use as base name for tags
           images: |