Use four spaces in frontmatter blocks

source/_daily_emails/2023-05-04.md

@@ -1,15 +1,15 @@
 ---
 title: >
-  Speaking at the Symfony UK meetup in London
+    Speaking at the Symfony UK meetup in London
 pubDate: 2023-05-04
 permalink: >-
-  archive/2023/05/04/speaking-at-the-symfony-uk-meetup-london
+    archive/2023/05/04/speaking-at-the-symfony-uk-meetup-london
 tags:
-  - speaking
-  - mob-programming
-  - php
-  - phpc
-  - symfony
+    - speaking
+    - mob-programming
+    - php
+    - phpc
+    - symfony
 ---
 
 After registering as an attendee, I've been upgraded to a speaker for next week's event and the first in-person Symfony UK meetup in two years.