Update docker/build-push-action digest to 7a786bb

Author: renovate[bot]

Diff for: .github/workflows/container.yml

@@ -51,7 +51,7 @@ jobs:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09
+        uses: docker/build-push-action@7a786bb2b9408f7f997564f677248fabd4b886d5
         with:
           context: .
           push: true