GPU task aborted fix attempt

Getting those kind of errors in app logs :
```
[ERROR:0@594145.397] global parallel_impl.cpp:244 WorkerThread 14: Can't spawn new thread: res = 11
```

Fix from https://blog.csdn.net/zsytony/article/details/116712444

app.py

@@ -50,6 +50,8 @@ ip_model_plus = IPAdapterFaceIDPlus(pipe, image_encoder_path, ip_plus_ckpt, devi
 app = FaceAnalysis(name="buffalo_l", providers=['CPUExecutionProvider'])
 app.prepare(ctx_id=0, det_size=(640, 640))
 
+cv2.setNumThreads(1)
+
 @spaces.GPU(enable_queue=True)
 def generate_image(images, prompt, negative_prompt, preserve_face_structure, face_strength, likeness_strength, nfaa_negative_prompt, progress=gr.Progress(track_tqdm=True)):
     faceid_all_embeds = []