Update webinar page

src/pages/webinar.astro

@@ -21,6 +21,8 @@ import Main from '../layouts/main.astro';
                 Attend our upcoming webinars
                 </h1>
             <div class="leading-loose">
+            <p class="text-xl playfair-display-normal">We will regularly organize webinars throughout the hackathon period to assist participants in learning, creating, and presenting their animation videos. These webinars are exclusively for registered participants. Please find below the details for the upcoming webinars.
+            </p>
             <ol class="list-decimal mx-2 md:text-xl text-sm playfair-display-normal pt-3">
                 <li class="text-2xl mb-4">How to learn Synfig Studio Using a Spoken Tutorial? 
                 <p class="text-xl"> - Monday - 8th April | 3 - 3.45 pm (Presenter - Khushalsingh).</p></li>