fixed broken link on plugin page

git-svn-id: https://plugins.svn.wordpress.org/recent-popular-tags/trunk@951863 b8457f37-d9ea-0310-8a92-e5e31aec5664
update link

git-svn-id: https://plugins.svn.wordpress.org/recent-popular-tags/trunk@951864 b8457f37-d9ea-0310-8a92-e5e31aec5664