Description

fse-templates.md seems to be full-site-editing-templates.md. This fixes the link, which hopefully fixes the site generation.

How has this been tested?

• Navigating to https://developer.wordpress.org/block-editor/explanations/architecture/full-site-editing-templates/
• Checking with the internet archive (looks like they have no record of the link name).

Screenshots

Types of changes

Documentation edit (single part of single file).

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

(Note: None of the above apply, but 🤷 deleting felt less easy than ticking).