text: Title: Queuing related guides contain outdated information about `concurrency_count`
  Body: ### Describe the bug
  
  These guides related to queuing still refer to `concurrency_count`:
  - [Queuing](https://www.gradio.app/guides/queuing)
  - [Setting Up a Demo for Maximum Performance](https://www.gradio.app/guides/setting-up-a-demo-for-maximum-performance)
  
  However, as confirmed in #9463:
  > The `concurrency_count` parameter has been removed from `.queue()`. In Gradio 4, this parameter was already deprecated and had no effect. In Gradio 5, this parameter has been removed altogether.
  
  Running the code from [Queuing](https://www.gradio.app/guides/queuing) guide results in the error below:
  ```
  Exception has occurred: TypeError
  EventListener._setup.<locals>.event_trigger() got an unexpected keyword argument 'concurrency_count'
    File "./test_gradio.py", line 23, in <module>
      greet_btn.click(fn=greet, inputs=[tag, output], outputs=[
  TypeError: EventListener._setup.<locals>.event_trigger() got an unexpected keyword argument 'concurrency_count'
  ```
  
  ### Have you searched existing issues?  🔎
  
  - [X] I have searched and found no existing issues
  
  ### Reproduction
  
  ```python
  # Sample code from https://www.gradio.app/guides/queuing
  
  import gradio as gr
  
  with gr.Blocks() as demo:
      prompt = gr.Textbox()
      image = gr.Image()
      generate_btn = gr.Button("Generate Image")
      generate_btn.click(image_gen, prompt, image, concurrency_count=5)
  ```
  
  
  ### Screenshot
  
  _No response_
  
  ### Logs
  
  _No response_
  
  ### System Info
  
  ```shell
  Gradio Environment Information:
  ------------------------------
  Operating System: Darwin
  gradio version: 5.6.0
  gradio_client version: 1.4.3
  ```
  
  
  ### Severity
  
  I can work around it