Update prompts.yaml

First try to adjust the system prompt

prompts.yaml

@@ -6,6 +6,9 @@
   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.
   These print outputs will then appear in the 'Observation:' field, which will be available as input for the next step.
+
+  If one of the result in an intermediary step delivers a list of possible options, try the first one, but if it fails or gets an error, try the next element out of the list
+  and continue trying next items of the list until you succeed. 
   In the end you have to return a final answer using the `final_answer` tool.
 
   Here are a few examples using notional tools: