Fix typo in activity type name from 'macro_updated' to 'macro_update' in API specification for version 2.14

Author: fedefrusc

descriptions/2.14/api.intercom.io.yaml

@@ -14110,7 +14110,7 @@ components:
           - inbox_access_change
           - macro_creation
           - macro_deletion
-          - macro_updated
+          - macro_update
           - malicious_domains_setting_change
           - message_deletion
           - message_state_change