fixed the stopwatchbox.js url

Author: AhsanAyaz

www/index.html

@@ -5,7 +5,7 @@
   <base href="https://ahsanayaz.github.io/stop-watch-box/">
   <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=5.0">
   <title>Stencil Component Starter</title>
-  <script src="/build/stopwatchbox.js"></script>
+  <script src="build/stopwatchbox.js"></script>
   <!-- <script src="https://unpkg.com/[email protected]/dist/stopwatchbox.js"></script> -->
 
   <style>