chore(deps): bump docker/build-push-action from 5 to 6 (#26)

Author: dependabot[bot]

.github/workflows/elixir.yml

@@ -207,7 +207,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Build integration runner
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./integration/Dockerfile