Fixed typo in settings page text.

git-svn-id: https://plugins.svn.wordpress.org/search-autocomplete/trunk@849681 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed typo in settings page text.

git-svn-id: https://plugins.svn.wordpress.org/search-autocomplete/trunk@849682 b8457f37-d9ea-0310-8a92-e5e31aec5664