add run assignment rules note to 2.11

Author: Eclairemoy

descriptions/2.11/api.intercom.io.yaml

@@ -5815,6 +5815,9 @@ paths:
       - Conversations
       operationId: autoAssignConversation
       description: |
+        {% admonition type="danger" name="Deprecation of Run Assignment Rules" %}
+        Run assignment rules is now deprecated in version 2.12 and future versions and will be permanently removed on December 31, 2026. After this date, any requests made to this endpoint will fail.
+        {% /admonition %}
         You can let a conversation be automatically assigned following assignment rules.
         {% admonition type="warning" name="When using workflows" %}
         It is not possible to use this endpoint with Workflows.