Make BaseModule methods dynamic

src/Module/Debug/WebFinger.php

@@ -31,7 +31,7 @@ use Friendica\Network\Probe;
  */
 class WebFinger extends BaseModule
 {
-	public static function content()
+	public function content(): string
 	{
 		if (!local_user()) {
 			throw new \Friendica\Network\HTTPException\ForbiddenException(DI::l10n()->t('Only logged in users are permitted to perform a probing.'));