Update icon for unlisted videos

src/invidious/views/watch.ecr

@@ -65,7 +65,7 @@ var video_data = {
 
     <% if !video.is_listed %>
         <h3>
-            <i class="icon ion-ios-lock"></i> <%= translate(locale, "Unlisted") %>
+            <i class="icon ion-ios-unlock"></i> <%= translate(locale, "Unlisted") %>
         </h3>
     <% end %>