added live demo link of weather app

Author: sumn2u

en/beginner-projects/weather-app.md

@@ -20,3 +20,13 @@ A simple app that fetches and displays weather information based on user locatio
 ## Bonus Challenge
 Add weather icons and background changes based on weather conditions.
 
+## Live Demo
+<div align="center">
+  <iframe
+    src="https://codesandbox.io/embed/qq8r9n?view=preview&module=%2Findex.html"
+    style="width:100%; height:500px; border:0; border-radius:8px; overflow:hidden;"
+    title="Weather App"
+    allow="accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; hid; microphone; midi; payment; usb; vr; xr-spatial-tracking"
+    sandbox="allow-forms allow-modals allow-popups allow-presentation allow-same-origin allow-scripts"
+  ></iframe>
+</div>