chore(deps): update docker/build-push-action action to v6.4.0

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

Author: renovate[bot]

.github/workflows/images.yaml

@@ -57,7 +57,7 @@ jobs:
       # main branch or tag pushes
       - name: CI Build ${{ matrix.name }}
         if: ${{ github.event_name != 'pull_request_target' }}
-        uses: docker/build-push-action@1a162644f9a7e87d8f4b053101d1d9a712edc18c # v6.3.0
+        uses: docker/build-push-action@a254f8ca60a858f3136a2f1f23a60969f2c402dd # v6.4.0
         id: docker_build_ci_main
         with:
           context: .
@@ -79,7 +79,7 @@ jobs:
       # PR updates
       - name: CI Build ${{ matrix.name }}
         if: ${{ github.event_name == 'pull_request_target' }}
-        uses: docker/build-push-action@1a162644f9a7e87d8f4b053101d1d9a712edc18c # v6.3.0
+        uses: docker/build-push-action@a254f8ca60a858f3136a2f1f23a60969f2c402dd # v6.4.0
         id: docker_build_ci_pr
         with:
           context: .