update

README.md

@@ -8,5 +8,5 @@ Description: https://github.com/olikraus/u8g2/wiki
 
 Issue Tracker: https://github.com/olikraus/u8g2/issues
 
-Download 2.20.3:  //github.com/olikraus/U8g2_Arduino/archive/master.zip
+Download (2.20.3): https://github.com/olikraus/U8g2_Arduino/archive/master.zip