Fix changelog typo

Author: ehrenfeu

CHANGELOG.md

@@ -8,7 +8,7 @@
 
 * `pathtools.join2` can be used to join paths, much like `os.path.join` except
   that it will work with `java.io.File` objects as well (but doesn't support
-  more than two path components / parameters).)
+  more than two path components / parameters).
 
 ### Changed