Fix changelog script

ahoy.changelog.yml

@@ -2,7 +2,7 @@ ahoyapi: v2
 commands:
   extract:
     cmd: |
-      if [ "x$1" <> "x" ]; then
+      if [ "x$1" != "x" ]; then
         cd $1
       fi
       git log $(git describe --tags `git rev-list --tags --max-count=1`)..HEAD --oneline | cut -d' ' -f 2-999