Updated Insiders section (#7540)

* Fixed links and wording

* Fixed links and wording

Author: katharinalisalin

docs/insiders/index.md

@@ -1,9 +1,5 @@
 # Insiders
 
-If you want to get the best out of Material for MkDocs, Insiders is what you're
-looking for – it's an exclusive version of Material for MkDocs that offers
-additional features and enhancements. By becoming a sponsor, you get early access
-
 Material for MkDocs Insiders offers an enhanced experience with early access to
 exclusive features that aren't available in the community edition. Become a
 sponsor and make use of these features directly!

docs/insiders/license.md

@@ -62,3 +62,6 @@ commercial use and ask our sponsors to respect these requirements when
 initiating a sponsorship. Additionally, we base our sponsoring tiers on the number
 of sites you intend to build. Please upgrade your sponsorship accordingly to
 support the project’s growth and ensure its continued development.
+
+  [fork]: access-management.md/#forking
+  [mirror]: access-management.md/#mirroring