Refence Cmder.exe in install instructions

Current install instructions reference `Cmder.bat` to execute the program
but this file is no longer included in the release bundles.

Author: Jackbennett

index.html

@@ -76,7 +76,7 @@ <h4>Installation</h4>
                     <ol>
                         <li>Unzip (can take a while) </li>
                         <li>(optional) Place your executables in <code>/bin</code> folder</li>
-                        <li>Run <strong>Cmder.bat</strong> </li>
+                        <li>Run <strong>Cmder</strong> <em>(Cmder.exe)</em></li>
                     </ol>
                 </div>
             </section>