fixed unicode character in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/cronblocks/trunk@812134 b8457f37-d9ea-0310-8a92-e5e31aec5664
applying 1.0.1 into trunk

git-svn-id: https://plugins.svn.wordpress.org/cronblocks/trunk@831346 b8457f37-d9ea-0310-8a92-e5e31aec5664
rebranching

git-svn-id: https://plugins.svn.wordpress.org/cronblocks/branches/1.0@831348 b8457f37-d9ea-0310-8a92-e5e31aec5664