docs: improve wording

index.html

···
                         </svg>
                         <h2>Welcome to KnotView</h2>
                         <p class="subtitle">
-                            A web-based repository browser for AT Protocol
-                            repositories. Browse, explore, and download content
-                            from Knot servers.
+                            A web-based repository browser for Tangled Knots.
+                            Browse, explore, and download content from Knot
+                            servers.
                         </p>
 
                         <div class="feature-list">
···
                                 </li>
                                 <li>Select a repository from the list</li>
                                 <li>
-                                    Browse files, switch branches, and explore!
+                                    Browse files, switch branches, and explore
+                                    even if Tangled AppView is down!
                                 </li>
                             </ol>
                         </div>