Update linked URL in test

Author: finestructure

Tests/AppTests/__Snapshots__/WebpageSnapshotTests/test_PackageShowView_customCollection.1.html

@@ -169,7 +169,7 @@ <h4>When working with a Swift Package Manager manifest:</h4>
                 <li class="plugins">No plugins</li>
                 <li class="macros">2 macros</li>
                 <li class="custom-collections">
-                  <a href="https://github.com/foo/bar/list.json">Custom Collection</a>
+                  <a href="/collections/Custom Collection">Custom Collection</a>
                 </li>
               </ul>
             </section>