docs: update comment

Author: Dane Pilcher

packages/appsync-modelgen-plugin/src/visitors/appsync-visitor.ts

@@ -1184,7 +1184,7 @@ export class AppSyncModelVisitor<
               connectionInfo.targetName !== 'id'
             ) {
               // Need to remove the field that is targetName
-              // Don't remove the field if it is a primary key field
+              // Don't remove the field if it is part of the primary key field on the parent model
               const primaryKeyFieldNames = getModelPrimaryKeyComponentFields(model).map(field => field.name);
               connectionInfo.targetNames
                 .filter(targetName => !primaryKeyFieldNames.includes(targetName))