Fix GitHub Pages demo by loading library and data from Cloudflare CDN

GitHub Pages is configured in legacy build mode (serves main:/docs
directly), so the GitHub Actions workflow's artifact is ignored. Built
files under docs/dist/ are gitignored and therefore never reach the
deployed site, causing "Jpostcode is not defined" errors on
matzlika.github.io/jpostcode-js/.

Point the demo's script src and Jpostcode.setBaseUrl() at the
Cloudflare Pages distribution so the page works regardless of which
host serves the HTML.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 9re

docs/index.html

@@ -501,8 +501,10 @@ <h3>Node.js / TypeScript</h3>
         </div>
     </footer>
 
-    <script src="./dist/jpostcode-web.js"></script>
+    <script src="https://jpostcode-js.pages.dev/dist/jpostcode-web.js"></script>
     <script>
+        Jpostcode.setBaseUrl('https://jpostcode-js.pages.dev/data/json/');
+
         // --- フォーム自動入力デモ ---
         const autofillZip   = document.getElementById('autofillZip');
         const autofillPref  = document.getElementById('autofillPref');