update banner with Selenium celebration [deploy site]

Author: harsha509

website_and_docs/layouts/partials/announcement-banner.html

@@ -5,10 +5,14 @@
   <div class="container g-0" style="padding: 10px;">
     <div class="row g-0 justify-content-center">
       <div class="alert alert-{{ $color }} col-12 fade show mb-0 p-0 -bg-{{ $color }}" role="alert">
-          <h4 class="alert-heading text-center m-0">
+          <h4 class="alert-heading text-center m-2">
           Selenium Conf 2025 Call for Proposals is now open! Submissions close 01 Dec, 2024.
           <a href="https://seleniumconf.com/?utm_medium=Referral&utm_source=selenium.dev&utm_campaign=cfp" target='_blank' aria-pressed="true"> Learn more & submit!</a>
           </h4>
+          <h4 class="alert-heading text-center m-4">
+              Join us for Celebrating 20 Glorious Years of Selenium on Oct 28th, 2024 -
+              <a href="https://www.selenium.dev/blog/2024/selenium-milestone-20yrs-blog/" target='_blank' aria-pressed="true"> More information here</a>
+          </h4>
       </div>
     </div>
   </div>