chore(deps): Update docker/build-push-action action to v6.18.0 (main) (#9435)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[docker/build-push-action](https://redirect.github.com/docker/build-push-action)
| action | minor | `v6.17.0` -> `v6.18.0` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the warning logs for
more information.

---

### Release Notes

<details>
<summary>docker/build-push-action (docker/build-push-action)</summary>

###
[`v6.18.0`](https://redirect.github.com/docker/build-push-action/releases/tag/v6.18.0)

[Compare
Source](https://redirect.github.com/docker/build-push-action/compare/v6.17.0...v6.18.0)

- Bump
[@&#8203;docker/actions-toolkit](https://redirect.github.com/docker/actions-toolkit)
from 0.61.0 to 0.62.1 in
[https://github.com/docker/build-push-action/pull/1381](https://redirect.github.com/docker/build-push-action/pull/1381)

> \[!NOTE]
> [Build
summary](https://docs.docker.com/build/ci/github-actions/build-summary/)
is now supported with [Docker Build
Cloud](https://docs.docker.com/build-cloud/).

**Full Changelog**:
docker/build-push-action@v6.17.0...v6.18.0

</details>

---

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.github/workflows/cd-dgraph-nightly.yml

@@ -22,7 +22,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v6.17.0
+        uses: docker/build-push-action@v6.18.0
         with:
           push: true
           platforms: linux/amd64,linux/arm64