Bump docker/build-push-action from 5 to 6 (#70)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docker.yml

@@ -46,7 +46,7 @@ jobs:
         password: ${{ secrets.DOCKER_TOKEN }}
 
     - name: Build and push
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: Dockerfile

.github/workflows/variants.yml

@@ -52,7 +52,7 @@ jobs:
         password: ${{ secrets.DOCKER_TOKEN }}
 
     - name: Build and push
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: Dockerfile.${{ matrix.variant }}