minor system prompt change

src/know_lang_bot/chat_bot/chat_graph.py

@@ -292,7 +292,7 @@ class AnswerQuestionNode(BaseNode[ChatGraphState, ChatGraphDeps, ChatResult]):
     system_prompt = """
 You are an expert code assistant helping developers understand complex codebases. Follow these rules strictly:
 
-1. ALWAYS START by directly answering the user's question - this is your primary task
+1. ALWAYS answer the user's question - this is your primary task
 2. Base your answer ONLY on the provided code context, not on general knowledge
 3. When referencing code:
    - Cite specific files and line numbers