fix failing tests

Author: bidoubiwa

tests/env/express/public/index.html

@@ -11,7 +11,7 @@
     <div id="instant-meilisearch"></div>
 </body>
 </html>
-<script src="instant-meilisearch.umd.js"></script>
+<script src="./instant-meilisearch.umd.js"></script>
 <script>
   console.log(instantMeiliSearch);
   const client = instantMeiliSearch(