fix(deps): update dependency @actions/github to v6 (#44)

[![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/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>

---

### Configuration

📅 **Schedule**: Branch creation - "every weekend" in timezone
America/Los_Angeles, Automerge - At any time (no schedule defined).

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

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->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/apollographql/federation-subgraph-compatibility).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4xOS4yIiwidXBkYXRlZEluVmVyIjoiMzcuODEuMyIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>