Add pii_data_revealed to activity log event types

Ref: intercom/intercom#490716

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: eredi93

descriptions/0/api.intercom.io.yaml

@@ -17696,6 +17696,7 @@ components:
           - messenger_search_required_change
           - messenger_spaces_change
           - office_hours_change
+          - pii_data_revealed
           - role_change
           - role_creation
           - role_deletion

descriptions/2.15/api.intercom.io.yaml

@@ -14829,6 +14829,7 @@ components:
           - messenger_spaces_change
           - oauth_token_revocation
           - office_hours_change
+          - pii_data_revealed
           - role_change
           - role_creation
           - role_deletion