Link to supported code blocks languages is broken

[xrmx]

Describe the bug

https://elastic.github.io/docs-builder/syntax/code/#supported-languages links to hljs.ts that is a 404.

Expected behavior

The link work fine

Steps to reproduce

No response

Tooling

• docs-builder
• migration tooling
• I'm not sure

[reakaleek]

The link needs to be replaced with https://github.com/elastic/docs-builder/blob/main/src/Elastic.Documentation.Site/Assets/hljs.ts in https://github.com/elastic/docs-builder/edit/main/docs/syntax/code.md