Fix typo in dir-spec.txt [found by sebastian]

doc/spec/dir-spec.txt

@@ -1618,7 +1618,7 @@
         * If consensus-method 7 or later is in use, the params line is
           included in the output.
 
-        * If the conesensus method is under 11, bad exits are considered as
+        * If the consensus method is under 11, bad exits are considered as
           possible exits when computing bandwidth weights.  Otherwise, if
           method 11 or later is in use, any router that is determined to get
           the BadExit flag doesn't count when we're calculating weights.