Use site URL

docs/admin.md

@@ -7,7 +7,7 @@ Resources and procedures related to administration of the Atomic Red Team
 project. 
 
 ## Updating enterprise-attack.json
-This file is a simple mirror of
+[This file]({{ site.github.repository_url }}/blob/master/atomic_red_team/enterprise-attack.json) is a simple mirror of
 https://github.com/mitre/cti/blob/master/enterprise-attack/enterprise-attack.json,
 and should be updated as needed to maintain currency with Enterprise ATT&CK
 tactics and techniques.