chore: Bump action workflows to versions that use Node24

[cswilson252]

Summary:

Bumps the actions under .github to versions that use Node 24, since this will become the default soon

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[cswilson252]

should be good here?

[davidgamez]

Hi @cswilson252 , most bumps are correct, but few don't actually reach Node 24:

• download-artifact@v6 → still node20. Needs @v7/@v8. (acceptance_test.yml, end_to_end.yml, notice_migration_generation.yml)
• github-script@v6 → node16. Needs @v8. (package_installers.yml)
• setup-node@v4 → node20. Needs @v5/@v6. The node-version: '24.x' input is unrelated to the action's own runtime. (create_issue_if_referencemd_changes.yml)

Other suggested changes:

• setup-python@v4 left unbumped in notice_migration_generation.yml (node16); setup-node@v4 untouched in web_client_test.yml.

[cswilson252]

Hi @cswilson252 , most bumps are correct, but few don't actually reach Node 24:

* **`download-artifact@v6`** → still **node20**. Needs `@v7`/`@v8`. (`acceptance_test.yml`, `end_to_end.yml`, `notice_migration_generation.yml`)

* **`github-script@v6`** → **node16**. Needs `@v8`. (`package_installers.yml`)

* **`setup-node@v4`** → **node20**. Needs `@v5`/`@v6`. The `node-version: '24.x'` input is unrelated to the action's own runtime. (`create_issue_if_referencemd_changes.yml`)

Other suggested changes:

* **`setup-python@v4`** left unbumped in `notice_migration_generation.yml` (node16); `setup-node@v4` untouched in `web_client_test.yml`.

ok, fixed these, thank you! :)