fix: avoid doubled page query parameters

Author: thorsten

phpmyfaq/src/phpMyFAQ/Pagination.php

@@ -171,7 +171,7 @@ protected function renderUrl(string $url = '', int $page = 1): string
 
         $urlToParse = '%s%s%s=%d';
         $cleanedUrl = Strings::preg_replace(
-            ['$&(amp;|)' . $this->urlConfig->pageParamName . '=(\d+)$'],
+            ['/[?&](amp;|)' . $this->urlConfig->pageParamName . '=(\d+)/'],
             replacement: '',
             subject: $url,
         );