Incorporate explanation from @colinhacks into message doc comment

Author: aaronhipple

src/ZodError.ts

@@ -285,7 +285,10 @@ export class ZodError<T = any> extends Error {
   }
 
   /**
-   * message returns the .issues field as a pretty-printed JSON string, NOT necessarily a human-readable message.
+   * message is a JSON.stringified issues array. This is an intentional decision
+   * to make the message property as informative as possible for logging, etc.
+   * You should use .issues to retrieve granular error information rather than
+   * JSON.parse(err.message).
    */
   override get message() {
     return JSON.stringify(this.issues, util.jsonStringifyReplacer, 2);