Redirect broken link in readme.

Author: HexDecimal

README.rst

@@ -55,7 +55,7 @@ For the most part it's just::
 ===========
 
 You can find the most recent changelog
-`here <https://github.com/libtcod/python-tcod/blob/develop/CHANGELOG.md>`_.
+`here <https://github.com/libtcod/python-tcod/blob/main/CHANGELOG.md>`_.
 
 =========
  License