app.py: changes for gradio major bump (#38)

- app.py: changes for gradio major bump (b6461a7674119bb13b7cb7a95f07f95bb8a0aa0b)
- README.md: bump gradio to 4 (bf998e6dcf852df2c7196888be643d8f7bc9ee1d)

README.md

@@ -4,7 +4,7 @@ emoji: 🔥
 colorFrom: yellow
 colorTo: gray
 sdk: gradio
-sdk_version: 3.42.0
+sdk_version: 4.3.0
 app_file: app.py
 pinned: false
 license: mit

app.py

@@ -328,4 +328,4 @@ with gr.Blocks(css=css) as demo:
             send_to_txt2img_btn.click(send_to_txt2img, inputs=[image_input], outputs=[tabs, prompt, negative_prompt, steps, seed,
                                                                                           model, sampler, width, height, cfg_scale])
 
-demo.queue(concurrency_count=64, max_size=80, api_open=False).launch(max_threads=256)
+demo.queue(concurrency_limit=64, max_size=80, api_open=False).launch(max_threads=256)