fixed a spelling error

[SVN r24323]

more/bibliography.html

@@ -52,7 +52,7 @@
 					Jeremy Siek, Lie-Quan Lee and Andrew Lumsdaine, <i>The Boost Graph Library</i>. 
 					Addison-Wesley, 2002. ISBN 0-201-72914-8. <a href="http://www.awl.com/cseng/titles/0-201-72914-8">
 						www.awl.com/cseng/titles/0-201-72914-8</a>
-					<P>A sample is chapter available at: <A href="http://tinyurl.com/24666">tinyurl.com/24666</A></P>
+					<P>A sample chapter is available at: <A href="http://tinyurl.com/24666">tinyurl.com/24666</A></P>
 				</td>
 			</tr>
 			<TR>