Format talk page front matter

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

@@ -2,30 +2,28 @@
 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"
-    url: https://speakerdeck.com/opdavies/having-fun-with-drupal-8-php-libraries-and-the-drupal-dot-org-api
+  id: 6e42ae9620bb4e91b3955f8c30d66934
+  ratio: "1.77777777777778"
+  url: https://speakerdeck.com/opdavies/having-fun-with-drupal-8-php-libraries-and-the-drupal-dot-org-api
 image:
-    url: '%site.assets.url%/assets/images/talks/having-fun-drupalorg-api.png'
-    width: 2000
-    height: 1125
-    type: image/png
+  url: '%site.assets.url%/assets/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: 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"
+    - name: Drupal Bristol
+      location: Bristol, UK
+      url: https://www.drupalbristol.org.uk
+      date: 2018-04-18
+      joindin: https://joind.in/talk/14851
 ---
 
 A overview and demo of some of the open source projects that I’ve been working on lately that are based on information from the Drupal.org API, including a PHP library for the API itself as well as some Drupal 8 modules that use it.