Update templates/gui.html

templates/gui.html

@@ -34,8 +34,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>PDF Viewer</title>
 
-    <!-- Include PDF.js -->
-    <script src="https://mozilla.github.io/pdf.js/build/pdf.js"></script>
+<!-- Load pdf.js from a CDN like UNPKG -->
+<script src="https://unpkg.com/pdfjs-dist@latest/build/pdf.js"></script>
+
 
     <style>
         #pdf-container {