feat: update site version in metadata and stylesheet link

Author: purwnt

src/_data/site.json

@@ -4,5 +4,6 @@
   "author": "Purwanto",
   "url": "https://belajarpython.com",
   "description": "Belajar Python gratis dengan tutorial lengkap berbahasa Indonesia. Panduan pemrograman Python dari dasar hingga mahir: data science, machine learning, AI, dan web development. Dipercaya 100+ kampus & perusahaan di Indonesia.",
-  "keywords": "belajar python, tutorial python, python indonesia, belajar python pemula, kursus python gratis, pemrograman python, python untuk data science, python machine learning"
+  "keywords": "belajar python, tutorial python, python indonesia, belajar python pemula, kursus python gratis, pemrograman python, python untuk data science, python machine learning",
+  "version": "1.3.0"
 }

src/_includes/head.njk

@@ -43,7 +43,7 @@
   <meta name="msvalidate.01" content="8CFBF57F61ECFF6C84740E37B7FCDE15" />
 
   <!-- Styles -->
-  <link rel="stylesheet" type="text/css" href="/css/base.css?v=1.2.8" />
+  <link rel="stylesheet" type="text/css" href="/css/base.css?v={{ site.version }}" />
   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.7.0/styles/atom-one-dark-reasonable.min.css">
   <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
   <script>hljs.initHighlightingOnLoad();</script>