Add boostsrp CND

index.html

@@ -9,6 +9,8 @@
   <meta name="description" content="Introducing Age Calculator App, a user-friendly app that helps you calculate your age accurately in seconds. Enter your birthdate and instantly see your age in years, months, days, hours, minutes, and even seconds!">
   <meta name="keywords" content="Age Calculator, Age Calculator App, Age Tracker, Birthday Calculator, Date of Birth Calculator, Open Source App, Free App">
    <link rel="stylesheet" href="style.css">
+  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css">
 <title> Age Calculator app</title>