Merge pull request 'Update docker/build-push-action action to v6' (#15) from renovate/docker-build-push-action-6.x into main

Reviewed-on: samuel-p/connectivity-check#15

.forgejo/workflows/docker.yml

@@ -24,7 +24,7 @@ jobs:
           username: ${{ secrets.CR_USERNAME }}
           password: ${{ secrets.CR_TOKEN }}
       - name: Build and push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           push: true
           tags: |