New link for basic usage guide

@castrojo @KyleGospo We're removing the documentation plugin, so the old link won't work soon.

index.html

@@ -485,7 +485,7 @@ <h3>Base Images</h3>
                                         </div>
                                         <a href="https://github.com/ublue-os/image-template" target="_blank" class="btn btn-mod btn-large btn-round btn-hover-anim"><span>Create a custom image</span></a>
                                     </div>
-                                    <span style="color:#555;margin-top:30px;width:100%;display:inline-block;"><a href="https://universal-blue.discourse.group/docs?topic=868" target="_blank">Direct usage Instructions</a></span>
+                                    <span style="color:#555;margin-top:30px;width:100%;display:inline-block;"><a href="https://universal-blue.discourse.group/t/how-to-install-universal-blues-base-images/868" target="_blank">Direct usage Instructions</a></span>
                                     <span style="color:#555;margin-top:5px;width:100%;display:inline-block"><a href="https://github.com/orgs/ublue-os/packages" targt="_blank">View all images on GitHub.</a></span>