chore(deps): update docker/build-push-action action to v6.9.0

Signed-off-by: renovate[bot] <bot@renovateapp.com>

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@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
+        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75 # v6.9.0
         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@32945a339266b759abcbdc89316275140b0fc960 # v6.8.0
+        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75 # v6.9.0
         id: docker_build_ci_pr
         with:
           context: .