Update app.py

app.py

@@ -17,7 +17,7 @@ for dirname, _, filenames in os.walk('/kaggle/input'):
 # You can also write temporary files to /kaggle/temp/, but they won't be saved outside of the current session
 
 
-pip install -Uqq fastai
+RUN pip install -Uqq fastai
 import gradio as gr
 from fastai.vision.all import*
 categories = ('Healthy Cell', 'Leukemia', 'Sickle Cell', 'Thalassemia')