Corrected spelling on web page

git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@353029 13f79535-47bb-0310-9956-ffa450edef68

src/documentation/xdocs/casestudies.xml

@@ -16,7 +16,7 @@
           A number of people are using POI for a variety of purposes.  As with
           any new API or technology, the first question people generally ask
           is not "how can I" but rather "Who else is doing what I'm about to
-          do?"  This is understandable with the abismal success rate in the
+          do?"  This is understandable with the abysmal success rate in the
           software business.  These case statements are meant to help create
           confidence and understanding.
        </p>