fix: update GitHub Actions to Node.js 24 compatible versions

[Copilot]

Node.js 20 actions are deprecated and will be forced to Node.js 24 by default on June 2, 2026. Both workflow files are affected.

github-pages.yml

Action	Before	After
checkout	actions/checkout@v4	actions/checkout@v6
hugo setup	peaceiris/actions-hugo@v3	direct wget + dpkg install (no node24 release exists yet)
setup-node	actions/setup-node@v4	actions/setup-node@v6
deploy	peaceiris/actions-gh-pages@v3	JamesIves/github-pages-deploy-action@v4

Also bumps the installed Node.js version from EOL 18 → 20 and updates publish_dir/github_token inputs to match the JamesIves action's API (folder, token).

update-api-refs.yaml

Action	Before	After
checkout	actions/checkout@v4	actions/checkout@v6
setup-go	actions/setup-go@v5	actions/setup-go@v6
create-pull-request	peter-evans/create-pull-request@v6	peter-evans/create-pull-request@v8

monitor-actions-hugo-node24.yml (new)

Adds a new scheduled workflow that runs once per day at 08:00 UTC to monitor peaceiris/actions-hugo#675. When the issue is closed and the latest release's action.yml confirms a node24 runtime, the workflow automatically opens a PR to replace the manual Hugo binary install in github-pages.yml with peaceiris/actions-hugo@<latest-tag>, preserving the Hugo version dynamically from the existing workflow.

[Simon Waight (sjwaight)]

It looks like actions-hugo might bump to Node 24 based on this Issue: peaceiris/actions-hugo#675. Copilot monitor this Issue - check once per day - and if it is closed as resolved, check if there's a Node24 version available of this action.

[Copilot]

It looks like actions-hugo might bump to Node 24 based on this Issue: peaceiris/actions-hugo#675. Copilot monitor this Issue - check once per day - and if it is closed as re...

Added .github/workflows/monitor-actions-hugo-node24.yml (commit e2d55df) which runs daily at 08:00 UTC. Each run:

1. Calls the GitHub API to check whether peaceiris/actions-hugo#675 is closed.
2. If closed, fetches the latest release's action.yml and uses Python to parse the using: runtime field — no action if it's still node20.
3. When node24 is confirmed, it patches github-pages.yml (replacing the manual wget/dpkg block with peaceiris/actions-hugo@<tag>, extracting the Hugo version dynamically from the existing workflow) and opens a PR via peter-evans/create-pull-request@v8.