Update peaceiris/actions-gh-pages action to v3.9.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
peaceiris/actions-gh-pages	action	patch	v3.9.0 -> v3.9.1

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Release Notes

peaceiris/actions-gh-pages

### [`v3.9.1`](https://togithub.com/peaceiris/actions-gh-pages/releases/tag/v3.9.1): actions-github-pages v3.9.1 [Compare Source](https://togithub.com/peaceiris/actions-gh-pages/compare/v3.9.0...v3.9.1) - update deps See [CHANGELOG.md](https://togithub.com/peaceiris/actions-gh-pages/blob/v3.9.1/CHANGELOG.md) for more details.

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Configuration

📅 Schedule: Branch creation - "after 10pm every weekday,before 5am every weekday,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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• [ ] If you want to rebase/retry this PR, check this box

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This PR has been generated by Mend Renovate. View repository job log here.

[codecov[bot]]

Codecov Report

Merging #263 (1db86e0) into main (700a2d6) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #263   +/-   ##
=======================================
  Coverage   92.54%   92.54%           
=======================================
  Files          12       12           
  Lines         993      993           
  Branches      189      191    +2     
=======================================
  Hits          919      919           
  Misses         41       41           
  Partials       33       33           

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