ci: fix typo in setup php

Author: lotyp

.github/workflows/testing.yml

@@ -34,7 +34,7 @@ jobs:
         uses: shivammathur/[email protected]
         with:
           php-version: ${{ matrix.php-version }}
-          extensions: none, ctype, dom, json, mbstring, simplexml, tokenizer, xml, xmlwriter, pdo, curl, fileinfo, pdo_mysql pdo_sqlite
+          extensions: none, ctype, dom, json, mbstring, simplexml, tokenizer, xml, xmlwriter, pdo, curl, fileinfo, pdo_mysql, pdo_sqlite
           ini-values: error_reporting=E_ALL
           coverage: xdebug