Update dependency @actions/github to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@actions/github (source)	5.1.1 -> 6.0.0

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Release Notes

actions/toolkit (@​actions/github)

v6.0.0

• Support the latest Octokit in @​actions/github #​1553
  • Drop support of NodeJS v14, v16

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Configuration

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Latest commit: 6233687

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