Fix spelling mistake "Donwload" -> "Download"

Author: michadasis

index.html

@@ -119,7 +119,7 @@ <h2>Γνωρίστε το UniOS!</h2>
                               <a href="https://discord.gg/QA9AxTdppX">Discord <i class="fa-brands fa-discord"></i></a>
                           </div>
                           <div class="white-button scroll-to-section">
-                              <a href="https://drive.google.com/file/d/1xKIhVgot7agSh11pZIM-_6tyI_fbTSFX/view?usp=sharing">Donwload <i class="fa-solid fa-download"></i></a>
+                              <a href="https://drive.google.com/file/d/1xKIhVgot7agSh11pZIM-_6tyI_fbTSFX/view?usp=sharing">Download <i class="fa-solid fa-download"></i></a>
                           </div>
                       </div>
                   </div>