Update app.py

app.py

@@ -13,7 +13,7 @@ async def echo(request: Request):
     data=data.split()
     lst=""
     for i in data:
-        lst+=upper(i[0])
+        lst+=i[0].upper()
         lst+=i[1:]
         lst+=" "
     return JSONResponse(content={"you_sent": lst})