Update file name in installation instructions

Author: TheRainbowPhoenix

install-guide/index.html

@@ -267,8 +267,8 @@ <h1>Your Classpad is <span>Python ready</span></h1>
                 <div class="step">
                     <div class="step-number">1</div>
                     <div class="step-content">
-                        <h3 class="step-title">Copy PythonExtra.bin to your calculator</h3>
-                        <p class="step-subtitle">Copy the PythonExtra.bin file to the root of your calculator's storage, next to the run.bin file. Also copy any games and apps you want to run to the appropriate folders.</p>
+                        <h3 class="step-title">Copy PythonExtra-hh2.bin to your calculator</h3>
+                        <p class="step-subtitle">Copy the PythonExtra-hh2.bin file to the root of your calculator's storage, next to the run.bin file. Also copy any games and apps you want to run to the appropriate folders.</p>
                     </div>
                 </div>
 
@@ -319,4 +319,4 @@ <h3 class="step-title">Enjoy Python</h3>
         </div>
     </footer>
 </body>
-</html>
+</html>