Update app.py

app.py

@@ -1,9 +1,9 @@
 #### ignore these lines -- just needed to install and build a particular branch
 import os
-os.system("git clone git@github.com:gradio-app/gradio.git")
+os.system("git clone https://github.com/gradio-app/gradio.git")
 os.system("cd gradio")
 os.system("git checkout flagging-spaces")
-os.system("pip uninstall gradio")
+os.system("pip uninstall -y gradio")
 os.system("pip install -e gradio")
 os.system("cd frontend")
 os.system("npm install")