Documentation: Update link to public internal documentation in README.md

Author: @Kaneda-1

Author: Kaneda-1

Diff for: README.md

@@ -204,4 +204,4 @@ In short, we ask you to send us Pull Requests based on a branch that you create
 with this purpose into your repository forked from the original Chamilo repository.
 
 # Documentation
-For more information on Chamilo, visit https://1.11.chamilo.org/documentation/index.html
+For more information on Chamilo, visit https://11.chamilo.org/documentation/index.html