Update dependency @actions/github to v6

[balena-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@actions/github (source)	dependencies	major	^5.0.0 -> ^6.0.0

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Release Notes

actions/toolkit (@​actions/github)

### [`v6.0.0`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#600) - Support the latest Octokit in [@​actions/github](https://togithub.com/actions/github) [#​1553](https://togithub.com/actions/toolkit/pull/1553) - Drop support of NodeJS v14, v16 ### [`v5.1.1`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#511) - Export default octokit options [#​1188](https://togithub.com/actions/toolkit/pull/1188) ### [`v5.1.0`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#510) - Add additionalPlugins parameter to getOctokit method [#​1181](https://togithub.com/actions/toolkit/pull/1181) - Dependency updates [#​1180](https://togithub.com/actions/toolkit/pull/1180) ### [`v5.0.3`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#503) - - Update to v2.0.1 of `@actions/http-client` [#​1087](https://togithub.com/actions/toolkit/pull/1087) ### [`v5.0.2`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#502) - Update to v2.0.0 of `@actions/http-client` ### [`v5.0.1`](https://togithub.com/actions/toolkit/blob/HEAD/packages/github/RELEASES.md#501) - [Update Octokit Dependencies](https://togithub.com/actions/toolkit/pull/1037)

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