Convered internal docs link to relative links

doc/administration/high_availability/README.md

@@ -5,6 +5,6 @@ type: reference, concepts
 The page have been deprecated, please see:
 
 1. [Availability page](../availability/index.md)
-1. [Scaling page](https://docs.gitlab.com/ee/administration/scaling/)
-1. [Docs page for high availability](https://docs.gitlab.com/ee/administration/high_availability/gitlab.html)
-1. [High availability solitions page](https://about.gitlab.com/solutions/high-availability/)
+1. [Scaling page](../scaling/index.md)
+1. [Docs page for high availability](./gitlab.md)
+1. [High availability solutions page](https://about.gitlab.com/solutions/high-availability/)