Update variable names

source/_pages/presentations.html.twig

@@ -8,14 +8,14 @@ use: [presentations]
 
 <p>Since September 2012, I have given {{ presentation_count }} public talks and workshops at various conferences and meetups, in-person and remotely, on topics including PHP, Drupal, automated testing, Git, CSS, and systems administration.</p>
 
-{% for talk in data.presentations|sort((a, b) => a.events|last.date|date('U') > b.events|last.date|date('U') ? -1 : 1) %}
+{% for presentation in data.presentations|sort((a, b) => a.events|last.date|date('U') > b.events|last.date|date('U') ? -1 : 1) %}
   <article>
     <div class="not-prose">
       <h2 class="text-xl font-bold">
-        <a class="font-bold text-blue-primary dark:text-blue-400" href="{{ talk.url|trim('/', 'right') }}">{{ talk.title }}</a>
+        <a class="font-bold text-blue-primary dark:text-blue-400" href="{{ presentation.url|trim('/', 'right') }}">{{ presentation.title }}</a>
       </h2>
     </div>
 
-    <p>{{ talk.description }}</p>
+    <p>{{ presentation.description }}</p>
   </article>
 {% endfor %}