Update actions/github-script action to v8 (#4735)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/github-script](https://redirect.github.com/actions/github-script) | action | major | `v7` -> `v8` |

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### Release Notes

<details>
<summary>actions/github-script (actions/github-script)</summary>

### [`v8`](https://redirect.github.com/actions/github-script/compare/v7...v8)

[Compare Source](https://redirect.github.com/actions/github-script/compare/v7...v8)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] If you want to rebase/retry this PR, check this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/X-oss-byte/Nextjs).

Author: renovate[bot]

.github/workflows/notify_release.yml

@@ -9,7 +9,7 @@ jobs:
   notify:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v7
+      - uses: actions/github-script@v8
         id: notify-new-release
         with:
           result-encoding: string