Update dependency @actions/github to v6 (#339)

[![Mend Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@actions/github](https://togithub.com/actions/toolkit/tree/main/packages/github) ([source](https://togithub.com/actions/toolkit)) | [`5.1.1` -> `6.0.0`](https://renovatebot.com/diffs/npm/@actions%2fgithub/5.1.1/6.0.0) | [![age](https://developer.mend.io/api/mc/badges/age/npm/@actions%2fgithub/6.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@actions%2fgithub/6.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@actions%2fgithub/5.1.1/6.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@actions%2fgithub/5.1.1/6.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### ⚠ Dependency Lookup Warnings ⚠

Warnings were logged while processing this repo. Please check the Dependency Dashboard for more information.

---

### Release Notes

<details>
<summary>actions/toolkit (@&#8203;actions/github)</summary>

### [`v6.0.0`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#600)

-   Support the latest Octokit in [@&#8203;actions/github](https://togithub.com/actions/github) [#&#8203;1553](https://togithub.com/actions/toolkit/pull/1553)
    -   Drop support of NodeJS v14, v16

</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 has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://developer.mend.io/github/X-oss-byte/Canary-nextjs).