[Doc] update to 3.9.2 (backport #66170)

[mergify]

Why I'm doing:

Updating Docusaurus to 3.9.2:

This should help us avoid problems with CVEs, and speed up the builds.

There is a small change needed in the docs, so this will be marked as DRAFT until the docs PR is submitted and merged.

What I'm doing:

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 4.0
  • 3.5
  • 3.4
  • 3.3

---

This is an automatic backport of pull request #66170 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 634ecf6 has failed:

On branch mergify/bp/branch-3.1/pr-66170
Your branch is up to date with 'origin/branch-3.1'.

You are currently cherry-picking commit 634ecf6b95.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   docs/docusaurus/docusaurus.config.js
	modified:   docs/docusaurus/package.json
	modified:   docs/docusaurus/sidebars.json
	modified:   docs/docusaurus/src/css/custom.css
	modified:   docs/docusaurus/yarn.lock
	modified:   docs/en/sql-reference/data-types/string-type/_category_.yml
	modified:   docs/en/sql-reference/sql-functions/string-functions/_category_.yml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/docusaurus/src/theme/Admonition.js

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

@mergify[bot]: Backport conflict, please reslove the conflict and resubmit the pr

[mergify]

🧪 CI Insights

Here's what we observed from your CI run for 3071fa1.

❌ Job Failures

Pipeline	Job	Health on branch-3.1	Retries	🔍 CI Insights	📄 Logs
CI DOC Checker	markdownlint		2	View	View