⬆️ Update dependency @actions/github to v6 (#149)

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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/tree/HEAD/packages/github))
| [`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/)
|

---

### 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>

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