Merge branch 'docs-fe-guidelines-redirect' into 'master'

Docs: Update page with redirect code

See merge request gitlab-org/gitlab!42864

doc/development/frontend.md

+---
+redirect_to: 'fe_guide/index.md'
+---
 
-# Frontend Development Guidelines
-
-This page has moved [here](fe_guide/index.md).
+This document was moved to [another location](fe_guide/index.md).