Format front-matter data in talks

source/_talks/drupal-8-php-libraries-drupalorg-api.md

@@ -2,28 +2,29 @@
 title: Having Fun with Drupal 8, PHP libraries and the Drupal.org API
 description: A crash course in developing PHP packages and Drupal 8 modules, based on the Drupal.org API.
 speakerdeck:
-  id: 6e42ae9620bb4e91b3955f8c30d66934
-  ratio: '1.77777777777778'
+    id: 6e42ae9620bb4e91b3955f8c30d66934
+    ratio: '1.77777777777778'
 image:
-  url: /images/talks/having-fun-drupalorg-api.png
-  width: 2000
-  height: 1125
-  type: image/png
+    url: /images/talks/having-fun-drupalorg-api.png
+    width: 2000
+    height: 1125
+    type: image/png
 video:
-  type: youtube
-  id: JyDjC7gGDpU
+    type: youtube
+    id: JyDjC7gGDpU
 events:
-  - name: Drupal Bristol
-    location: Bristol, UK
-    url: https://www.drupalbristol.org.uk
-    date: 2018-04-18
-    joindin: https://joind.in/talk/14851
-
-  - name: DrupalCamp London 2019
-    location: London, UK
-    url: http://drupalcamp.london
-    date: 2019-03-03
-    time: '12:05 - 12:50'
+    -
+        name: Drupal Bristol
+        location: Bristol, UK
+        url: https://www.drupalbristol.org.uk
+        date: 2018-04-18
+        joindin: https://joind.in/talk/14851
+    -
+        name: DrupalCamp London 2019
+        location: London, UK
+        url: http://drupalcamp.london
+        date: 2019-03-03
+        time: '12:05 - 12:50'
 sortable_date: 2019-03-03
 ---