Updated Codeowners (#220)

* Updated Codeowners

* small update

* small additional update

* minor update

.github/CODEOWNERS

@@ -2,7 +2,7 @@
 # the repo. Unless a later match takes precedence,
 # @global-owner1 and @global-owner2 will be requested for
 # review when someone opens a pull request.
-* @Azure/customer-architecture-team
+* @Azure/customer-architecture-team @Azure/esa-admins
 
-.github/CODEOWNERS @uday31in @marvinbuss
+/.github/ @Azure/customer-architecture-team
-.github/** @Azure/customer-architecture-team
+/.github/CODEOWNERS @uday31in @marvinbuss