Fix incorrect version for 2.11

Author: VedranZoricic

descriptions/2.11/api.intercom.io.yaml

@@ -16078,9 +16078,6 @@ components:
       - '2.9'
       - '2.10'
       - '2.11'
-      - '2.12'
-      - '2.13'
-      - '2.14'
       - Unstable
     linked_object:
       title: Linked Object