Updating links for new docs subdomain (#1494)

Docs have moved from min.io/docs to docs.min.io/commuinity.

This fixes hard, external links to use the new subdomain.

Note that some of these files are automatically pulled from elsewhere as
part of the build process, so some may not carry through even after this
PR merges.

Author: djwfyi

new-platform.md

@@ -2,7 +2,8 @@
 
 ## Overview
 
-The documentation URLs take the path min.io/docs/$program/$platform/
+The documentation URLs take the path docs.min.io/community|enterprise/$program/
+Note: we no longer use `$platform`.
 
 Where:
 - `$program` is `minio`, `kes`, or similar