update readme.txt change log for v 1.2

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@833583 b8457f37-d9ea-0310-8a92-e5e31aec5664
update spacing issue in change log section of readme.txt

git-svn-id: https://plugins.svn.wordpress.org/wp2yt-uploader/trunk@833584 b8457f37-d9ea-0310-8a92-e5e31aec5664