Update docker/build-push-action action to v6 (#32)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/deploy-single-docker-image.yml

@@ -218,7 +218,7 @@ jobs:
         username: ${{ secrets.SA_GITHUB_USERNAME }}
         password: ${{ secrets.SA_GITHUB_PAT }}
     - name: Build and push
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v6
       if: ${{ needs.check.outputs.rebuild == 'true' || inputs.force_rebuild }}
       with:
         context: ${{ steps.get-context.outputs.path }}