docs: Update error_type message to include all error types

Author: ellicenelson

descriptions/0/api.intercom.io.yaml

@@ -9645,7 +9645,7 @@ paths:
                     request_id: test-uuid-replacement
                     errors:
                     - code: parameter_invalid
-                      message: "Invalid error_type. Must be one of: request_configuration_error, faraday_error, 3rd_party_error, response_mapping_error, token_refresh_error"
+                      message: "Invalid error_type. Must be one of: request_configuration_error, faraday_error, 3rd_party_error, response_mapping_error, token_refresh_error, fin_action_response_formatting_error, fin_action_identity_verification_error, email_verification_error, non_fin_standalone_action_identity_verification_error, request_validation_error, client_side_action_error"
                 Invalid timestamp:
                   value:
                     type: error.list