Update app.py

app.py

@@ -3,7 +3,7 @@
 import os
 os.system('python -m mim install mmocr')
 os.system('python -m mim install "mmcv==2.0.0rc4"')
-os.system('python -m mim install mmengine==0.7.3')
+os.system('python -m mim install mmengine==0.7.0')
 os.system('python -m mim install "mmdet==3.0.0rc5"')
 os.system('pip install -v -e .')
 import cv2