[quickfix]: jquery showcase

```
Uncaught TypeError: Cannot read properties of undefined (reading 'length')
    at Function.each (jquery.min.js:2:14269)
    at Object.<anonymous> (main.js:7:15)
    at Object.<anonymous> (jquery.min.js:2:18263)
    at k (jquery.min.js:2:16920)
    at Object.fireWith [as resolveWith] (jquery.min.js:2:17707)
    at y (jquery.min.js:2:80804)
    at XMLHttpRequest.d (jquery.min.js:2:86374)
```

Author: maifeeulasad

showcase/javascripts/main.js

@@ -1,7 +1,7 @@
 try { if (!pt){ pt = {}; } } catch(e){pt = {};}
 
 $(document).ready(function(){
-    $.getJSON("https://api.github.com/users/maifeeulasad/repos?per_page=100")
+    $.getJSON("https://api.github.com/users/maifeeulasad/repos?per_page=100&callback=?")
         .then(function(projects){
             var h = "";
             $.each(projects.data, function(i, p) {