Update group.tokens.inc and add replacements for url-tokens

Closes #3499639

group.tokens.inc

@@ -213,6 +213,10 @@ function group_tokens($type, $tokens, array $data, array $options, BubbleableMet
     if ($changed_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
       $replacements += $token_service->generate('date', $changed_tokens, ['date' => $group->getChangedTime()], $options, $bubbleable_metadata);
     }
+
+    if (($url_tokens = $token_service->findWithPrefix($tokens, 'url'))) {
+      $replacements += $token_service->generate('url', $url_tokens, ['url' => $group->toUrl()], $options, $bubbleable_metadata);
+    }
   }
   elseif ($type == 'group_relationship' && !empty($data[$type])) {
     $group_relationship = $data['group_relationship'];
@@ -272,6 +276,10 @@ function group_tokens($type, $tokens, array $data, array $options, BubbleableMet
       if ($changed_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
         $replacements += $token_service->generate('date', $changed_tokens, ['date' => $group_relationship->getChangedTime()], $options, $bubbleable_metadata);
       }
+
+      if (($url_tokens = $token_service->findWithPrefix($tokens, 'url'))) {
+        $replacements += $token_service->generate('url', $url_tokens, ['url' => $group_relationship->toUrl()], $options, $bubbleable_metadata);
+      }
     }
   }