Update default.html

Author: pavly-gerges

_layouts/default.html

@@ -5,13 +5,17 @@
     <meta charset='utf-8'>
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width,maximum-scale=2">
+    <script>
+      MathJax = {
+        tex: {
+          inlineMath: [['$', '$'], ['\\(', '\\)']]
+        }
+      };
+    </script>
     <script
       type="text/javascript" id="MathJax-script" async
       src="https://cdn.jsdelivr.net/npm/mathjax@3.0.0/es5/tex-mml-chtml.js">
     </script>
-    <script type="text/javascript" id="MathJax-script" async
-      src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.0.0/es5/tex-mml-chtml.js">
-    </script>
     <link rel="stylesheet" type="text/css" media="screen" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
 
 {% seo %}