fix(docs): Update plausible script to use my instance

Author: crmne

docs/_includes/head_custom.html

@@ -4,4 +4,4 @@
 <link rel="apple-touch-icon" sizes="180x180" href="/assets/images/favicon/apple-touch-icon.png" />
 <meta name="apple-mobile-web-app-title" content="RubyLLM" />
 <link rel="manifest" href="/assets/images/favicon/site.webmanifest" />
-<script defer data-domain="rubyllm.com" src="https://plausible.io/js/script.outbound-links.js"></script>
+<script defer data-domain="rubyllm.com" src="https://stats.paolino.me/js/script.outbound-links.js"></script>