docs: fix links in rich-text referencing old lexical sections (#9972)

Author: akhrarovsaid

docs/rich-text/building-custom-features.mdx

@@ -79,7 +79,7 @@ This allows you to add i18n translations scoped to your feature. This specific e
 
 ### Markdown Transformers#server-feature-markdown-transformers
 
-The Server Feature, just like the Client Feature, allows you to add markdown transformers. Markdown transformers on the server are used when [converting the editor from or to markdown](/docs/lexical/converters#markdown-lexical).
+The Server Feature, just like the Client Feature, allows you to add markdown transformers. Markdown transformers on the server are used when [converting the editor from or to markdown](/docs/rich-text/converters#markdown-lexical).
 
 ```ts
 import { createServerFeature } from '@payloadcms/richtext-lexical';

docs/rich-text/overview.mdx

@@ -180,7 +180,7 @@ Notice how even the toolbars are features? That's how extensible our lexical edi
 
 ## Creating your own, custom Feature
 
-You can find more information about creating your own feature in our [building custom feature docs](/docs/lexical/building-custom-features).
+You can find more information about creating your own feature in our [building custom feature docs](/docs/rich-text/building-custom-features).
 
 ## TypeScript