docs(*): update the doc site

[spacewander]

If you're writing docs for 3.11, please write them in our new GH repo: https://github.com/Kong/developer.konghq.com We'll be publishing 3.11 on https://developer.konghq.com/ only, we will not be using docs.konghq.com.

Summary

Checklist

• [ ] The Pull Request has tests
• [ ] A changelog file has been created under changelog/unreleased/kong or skip-changelog label added on PR if changelog is unnecessary. README.md
• [ ] There is a user-facing docs PR against https://github.com/Kong/docs.konghq.com - PUT DOCS PR HERE

Issue reference

Fix #[issue number]