Bump docker/build-push-action from 5 to 6

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

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

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

Author: dependabot[bot]

.github/workflows/publish.yaml

@@ -54,7 +54,7 @@ jobs:
               type=ref,event=tag
 
         - name: Build and export to Docker
-          uses: docker/build-push-action@v5
+          uses: docker/build-push-action@v6
           with:
             context: .
             load: true
@@ -68,7 +68,7 @@ jobs:
             target_tar: file://${{ env.CONTAINER_TAR }}
 
         - name: Build and push
-          uses: docker/build-push-action@v5
+          uses: docker/build-push-action@v6
           id: build-and-push
           with:
             context: .

.github/workflows/test.yaml

@@ -103,7 +103,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Build and export to Docker
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           load: true