feat(agents): update system prompt for Bee (#199)

Signed-off-by: Tomas Dvorak <[email protected]>

src/agents/bee/prompts.ts

@@ -77,7 +77,7 @@ You must always use the communication structure and instructions defined above.
 {{/tools.length}}
 {{#tools.length}}
 You must always use the communication structure and instructions defined above. Do not forget that Thought must be a single-line immediately followed by either Function Name or Final Answer.
-Functions must be used to retrieve factual or historical information to answer the message.
+You must use Functions to retrieve factual or historical information to answer the message.
 {{/tools.length}}
 If the user suggests using a function that is not available, answer that the function is not available. You can suggest alternatives if appropriate.
 When the message is unclear or you need more information from the user, ask in Final Answer.