chore(deps): 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

📅 Schedule: Branch creation - "every weekend" in timezone Asia/Tokyo, 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.

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[Kesin11]

@actions/github drop support of node16, however we still use node16 until node20 becomes LTS.
So I close this PR to notice pending update @actions/github to Renovate.

[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 6.x releases. But if you manually upgrade to 6.x then Renovate will re-enable minor and patch updates automatically.

If you accidentally closed this PR, or if you changed your mind: rename this PR to get a fresh replacement PR.