Describe the IP allowlist values of previous_state and new_state

The activity log metadata fields previous_state and new_state also carry
`enabled` or `disabled` for IP allowlist changes, not only `idle` or
`occupied` for occupancy changes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: markdennis22

descriptions/2.16/api.intercom.io.yaml

@@ -23424,13 +23424,16 @@ components:
         previous_state:
           type: string
           nullable: true
-          description: The state before the change. `idle` or `occupied`, and null
-            when the Admin had not been classified yet.
+          description: The state before the change. `idle` or `occupied` for an
+            occupancy change, and null when the Admin had not been classified
+            yet; `enabled` or `disabled` for an IP allowlist change.
           example: idle
         new_state:
           type: string
           nullable: true
-          description: The state after the change. `idle` or `occupied`.
+          description: The state after the change. `idle` or `occupied` for an
+            occupancy change; `enabled` or `disabled` for an IP allowlist
+            change.
           example: occupied
         threshold_minutes:
           type: integer