CHANGELOG: Fix 'inhertence' -> 'inheritance' typo

Signed-off-by: W. Trevor King <wking@tremily.us>

Author: wking

CHANGELOG

@@ -1,7 +1,7 @@
 v3.9 (2014-09-01)
     * Catch and error out if a user adds a feed with a duplicate name.
     * Split sender into both sendmail's -F and -f.
-    * Fix an error with SMTPConnectionError inhertence order ("does not take keyword arguments").
+    * Fix an error with SMTPConnectionError inheritance order ("does not take keyword arguments").
     * Add a new `smtp-ssl-protocol` setting, to select acceptable protocols for SMTP connections.
     * Fix non-compliant User-Agent header for HTTP/1.1.
     * Fix an error in the NoToEmailAddress invocation.