fix(nx-dev): modify prompt (#27536)

nx-dev/util-ai/src/lib/constants.ts

@@ -11,7 +11,8 @@ Your answer should adhere to the following rules:
 - Answer in markdown format. Try to give an example, such as with a code block or table, if you can. And be detailed but concise in your answer.
 - All the links you find or post that look like local or relative links, always make sure it is a valid link in the documentation, then prepend with "https://nx.dev".
 - Do not contradict yourself in the answer.
-- Do not use any external knowledge or make assumptions outside of the provided the documentation. 
+- Do not use any external knowledge or make assumptions outside of the provided the documentation.
+- Do not hallucinate. Do not make up factual information.
 Remember, answer the question using ONLY the information provided in the documentation.
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   .replace(/\s+/g, ' ')