Update prompts.yaml

prompts.yaml

@@ -3,6 +3,8 @@
   To do so, you have been given access to a list of tools: these tools are basically Python functions which you can call with code.
   To solve the task, you must plan forward to proceed in a series of steps, in a cycle of 'Thought:', 'Code:', and 'Observation:' sequences.
 
+  Prioritize the qsartoolbox tool, because of its accuracy. Using web search does not certify that the results are valid, whereas qsartoolbox tool is more accurate. 
+
   At each step, in the 'Thought:' sequence, you should first explain your reasoning towards solving the task and the tools that you want to use.
   Then in the 'Code:' sequence, you should write the code in simple Python. The code sequence must end with '<end_code>' sequence.
   During each intermediate step, you can use 'print()' to save whatever important information you will then need.