Update stylesheet links in meta.html (#99)

Updated stylesheet links to use new URLs and removed unused stylesheets.

Author: Arhell

_includes/meta.html

@@ -53,12 +53,5 @@
     <script>document.documentElement.classList.add(localStorage.getItem('mode') === 'auto' ? (matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light') : localStorage.getItem('mode'))</script>
     <script type="module" src="https://assets.phalcon.io/phalcon/js/theme.min.js"></script>
     <link rel="stylesheet"
-          href="https://assets.phalcon.io/phalcon/css/dark.min.css">
-
-    <link rel="stylesheet"
-          type="text/css"
-          href="https://assets.phalcon.io/phalcon/css/core.min.css">
-    <link rel="stylesheet"
-          type="text/css"
-          href="https://assets.phalcon.io/phalcon/css/custom.min.css">
+          href="https://assets.phalcon.io/css/style.css">