Fix the action history passed into extract-action prompt

[ykeremy]

How it looks like after this PR:

[
{
   "action":{
      "action_type":"input_text",
      "description":null,
      "reasoning":"The user needs to search for the entity name \\'acme inc\\' to progress towards their goal. The input field with id 17 is the correct place to input the entity name as it is labeled \\'Entity Name\\'.",
      "element_id":17,
      "file_url":null
   },
   "results":[
      {
         "success":true,
         "exception_type":null,
         "exception_message":null,
         "data":null,
         "step_retry_number":0,
         "step_order":0,
         "javascript_triggered":false,
         "interacted_with_sibling":false,
         "interacted_with_parent":false
      },
      {
         "success":true,
         "exception_type":null,
         "exception_message":null,
         "data":null,
         "step_retry_number":0,
         "step_order":0,
         "javascript_triggered":false,
         "interacted_with_sibling":false,
         "interacted_with_parent":false
      }
   ]
},
{
   "action":{
      "action_type":"click",
      "description":null,
      "reasoning":"After inputting the entity name, the user needs to click the \\'Search\\' button to perform the search. The button with id 19 is labeled \\'Search\\' and is the correct element to click to initiate the search.",
      "element_id":19,
      "file_url":null
   },
   "results":[
      {
         "success":true,
         "exception_type":null,
         "exception_message":null,
         "data":null,
         "step_retry_number":0,
         "step_order":0,
         "javascript_triggered":false,
         "interacted_with_sibling":false,
         "interacted_with_parent":false
      }
   ]
}
]