Fix spelling.

CHANGES.txt

@@ -11,7 +11,7 @@ Next release
       environment=HOME=/home/auser
 
     Alphanumeric characters, "_", "/", ".", "+", "-", "(", and ")" can all be
-    used as a value without quoting. If any other characters are neeed in the
+    used as a value without quoting. If any other characters are needed in the
     value, please quote it as in the first example above.  Thanks to Paul 
     Heideman for reporting this issue.