readme.txt update

git-svn-id: https://plugins.svn.wordpress.org/kento-scroll-jump-top/trunk@1032348 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt

git-svn-id: https://plugins.svn.wordpress.org/kento-scroll-jump-top/trunk@1032349 b8457f37-d9ea-0310-8a92-e5e31aec5664