Fix toLowerCase()

{{cookiecutter.out_dir}}/web/index.html

@@ -31,7 +31,7 @@
 
   <script>
     var noCdn = "{{ cookiecutter.no_cdn }}";
-    if (noCdn.toLocaleLowerCase == "true") {
+    if (noCdn.toLowerCase() == "true") {
       var canvasKitBaseUrl = "/canvaskit/";
       var pyodideUrl = "/pyodide/pyodide.js";
     }