docs(deployment): add permissions config to github action file in v2.4.3

[chillinPanda]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

this is already documented in the latest version by commit 35183d7

See also #8877

This is also working for v2.4.3 and needed for using GitHub Pages and Actions with the default setting for the action's automatic GITHUB_TOKEN

Since v2.4.3 is the current version, which is shown by default, doc readers should also see the permission config, so they don't run into permission issues.

Test Plan

no code change, only mdx

Test links

Scroll down to Triggering deployment with GitHub Actions

• Tab Same -> Expander GitHub action files -> Code box .github/workflows/deploy.yml
• Tab Remote -> Expander GitHub action files -> Code box .github/workflows/deploy.yml

Deploy preview: https://deploy-preview-9377--docusaurus-2.netlify.app/docs/deployment#triggering-deployment-with-github-actions

Related issues/PRs

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 55	🟢 97	🟢 92	🟢 100	🟠 89	Report
/docs/installation	🟠 74	🟢 98	🟢 92	🟢 100	🟠 89	Report

[slorber]

Thanks ;)