Bump example page version to use v5.4

Author: bhousel

docs/index.html

@@ -6,7 +6,7 @@
 <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no'/>
 <script src='https://cdn.jsdelivr.net/npm/[email protected]/dist/mapbox-gl.min.js'></script>
 <script defer src='https://kit.fontawesome.com/c772610440.js' crossorigin='anonymous'></script>
-<script defer src="https://cdn.jsdelivr.net/npm/@rapideditor/country-coder@5.3/dist/country-coder.iife.min.js"></script>
+<script defer src="https://cdn.jsdelivr.net/npm/@rapideditor/country-coder@5.4/dist/country-coder.iife.min.js"></script>
 <!-- <script defer src='../dist/country-coder.iife.js'></script> -->
 <link href='https://cdn.jsdelivr.net/npm/[email protected]/dist/mapbox-gl.min.css' rel='stylesheet'/>
 <link href='style.css' rel='stylesheet' type='text/css'/>