Add margins to headings

source/_partials/talk/events.html.twig

@@ -1,5 +1,5 @@
 <div class="mt-8">
-    <h2>Events</h2>
+    <h2 class="mb-2">Events</h2>
 
     {% include "talks/table" with {
         talks: getAllTalks([page], site.events)|reverse,

source/_partials/talk/slides.html.twig

@@ -1,6 +1,6 @@
 {% if page.speakerdeck.id and page.speakerdeck.ratio %}
     <div class="mt-4">
-        <h2>Slides</h2>
+        <h2 class="mb-2">Slides</h2>
 
         {% include 'speakerdeck' with {
             data: page.speakerdeck,

source/_partials/talk/video.html.twig

@@ -1,6 +1,6 @@
 {% if page.youtube.id or page.vimeo.id %}
     <div class="talk-video mt-4">
-        <h2>Video</h2>
+        <h2 class="mb-2">Video</h2>
 
         <div class="w-full relative" style="padding-top: 56.25%">
             {% if page.youtube.id %}