text: Title: FileNotFoundError: [Errno 2] No such file or directory: 'path/to/project/exports/charts/temp_chart.png'
  Body: ### System Info
  
  OS version:  macOS Sonoma 14.4.1
  Python version: 3.10.12
  pandasai version: 2.0.28
  
  ### 🐛 Describe the bug
  
  It cannot go through when using the Agent to plot pictures. It is okay if the question response is supposed to be text.
  
  Below is my code:
  
  ```
  import os
  
  from dotenv import load_dotenv
  import pandas as pd
  from pandasai import Agent
  
  load_dotenv()
  
  DEFAULT_PICTURE_FOLDER = "./exports/charts"
  
  # create picture folder if necessary
  if not os.path.isdir(DEFAULT_PICTURE_FOLDER):
      os.makedirs(DEFAULT_PICTURE_FOLDER)
  
  df = pd.DataFrame({
      "country": ["United States", "United Kingdom", "France", "Germany", "Italy", "Spain", "Canada", "Australia", "Japan", "China"],
      "sales": [5000, 3200, 2900, 4100, 2300, 2100, 2500, 2600, 4500, 7000]
  })
  
  agent = Agent(
      df,
      config={
          "verbose": True,
          "enforce_privacy": True,
          "enable_cache": True,
          "conversational": False,
          "save_charts": False,
          "open_charts": False,
          "save_charts_path": DEFAULT_PICTURE_FOLDER,
      },
  )
  
  qeury = "Plot the histogram of countries in Europe showing for each the gdp, using different colors for each bar"
  response = agent.chat(qeury)
  ```
  
  
  full traceback is as below
  
  ```
  Traceback (most recent call last):
    File "/Users/liaden/miniconda3/envs/genai/lib/python3.10/site-packages/pandasai/pipelines/chat/generate_chat_pipeline.py", line 283, in run
      output = (self.code_generation_pipeline | self.code_execution_pipeline).run(
    File "/Users/liaden/miniconda3/envs/genai/lib/python3.10/site-packages/pandasai/pipelines/pipeline.py", line 137, in run
      raise e
    File "/Users/liaden/miniconda3/envs/genai/lib/python3.10/site-packages/pandasai/pipelines/pipeline.py", line 101, in run
      step_output = logic.execute(
    File "/Users/liaden/miniconda3/envs/genai/lib/python3.10/site-packages/pandasai/pipelines/chat/code_execution.py", line 134, in execute
      {"content_type": "response", "value": ResponseSerializer.serialize(result)},
    File "/Users/liaden/miniconda3/envs/genai/lib/python3.10/site-packages/pandasai/responses/response_serializer.py", line 29, in serialize
      with open(result["value"], "rb") as image_file:
  FileNotFoundError: [Errno 2] No such file or directory: '/Users/liaden/genai_streamlitapp/exports/charts/temp_chart.png'
  ```
  