fixed indent

main.py

@@ -18,7 +18,7 @@ async def button_press(gpio:int, level) -> bool:
             PTT_IS_ON = 1
         if(pi.read(gpio)==0):
             PTT_IS_ON = 0
-	asyncio.sleep(.5)
+    asyncio.sleep(.5)
 
 if __name__ == "__main__":
     asyncio.create_task(button_press(10, pigpio.EITHER_EDGE))