Update disallow-edits.yml (#45157)

Author: gewarren

.github/policies/disallow-edits.yml

@@ -73,9 +73,8 @@ configuration:
           - commentContains:
               pattern: '#sign-off'
               isRegex: False
-          - filesMatchPattern:
-              pattern: docs/csharp/*
-              matchAny: True
+          - isAssignedToUser:
+              user: BillWagner
           - not:
               isActivitySender:
                 user: BillWagner