Update disallow-edits.yml for breadcrumb file

Author: tynevi

.github/policies/disallow-edits.yml

@@ -177,4 +177,19 @@ configuration:
               label: do-not-merge
           - removeLabel:
               label: ready-to-merge
-
+      
+      - description: Write a message if the breadcrumb file is modified in the azure-docs-pr repository.
+        if:
+          - payloadType: Pull_Request
+          - isAction:
+              action: Opened
+          - or:
+              - filesMatchPattern:
+                  matchAny: true
+                  pattern: bread/toc.yml
+              
+        then:
+          - addReply:
+              reply: >-
+                @${issueAuthor} - This PR modifies the breadcrumb file for the entire repository in this pull request; the breadcrumb supports 100s of services. Please make sure your changes to the breadcrumb file are intentional. Do not delete this file. 
+