Fix typo in skills.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5208 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on May 24, 2008
5C7G5WNZ6USMI4TQFQGLIYOGKPM5H444H6HZV4XA3LRY2IIY4FIQC
Change contents