Update app.py

app.py

@@ -144,7 +144,7 @@ def decrypt_text1(im,in2):
     print(f'mes_bytes3::{mes_bytes3}')
     print(f'mes_bytes4::{mes_bytes4}')
 
-    file_out = open("encrypted_data.bin", "wb")
+    file_out = open("encrypted_data.bin", "w")
     [ file_out.write(x) for x in (mes_bytes1, mes_bytes2, mes_bytes3, mes_bytes4) ]
     file_out.close()