Update docs for commons-io 2.6

Author: uschindler

src/main/docs/bundled-signatures.html

@@ -54,7 +54,7 @@ <h1>Bundled Signatures Documentation</h1>
 
 <li><strong><tt>commons-io-unsafe-*</tt>:</strong> If your application uses the famous <i>Apache Common-IO</i> library,
 this adds signatures of all methods that depend on default charset
-(for versions <tt>*</tt> = 1.0, 1.1, 1.2, 1.3, 1.4, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5).</li>
+(for versions <tt>*</tt> = 1.0, 1.1, 1.2, 1.3, 1.4, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6).</li>
 
 </ul>