Fix YAML list

Author: capnrefsmmat

content/blog/_2021-04-20-jj-vaccine.Rmd

@@ -10,7 +10,8 @@ authors:
   - alex
 heroImage: /blog/images/blog-lg-vaccine-survey.jpg
 heroImageThumb: /blog/images/blog-thumb-vaccine-survey.jpg
-related: 2021-01-28-survey-vaccines
+related:
+  - 2021-01-28-survey-vaccines
 summary: |
   Did the suspension of the Johnson & Johnson COVID vaccine increase vaccine
   hesitancy in the United States?

content/blog/_2021-04-20-jj-vaccine.html

@@ -10,7 +10,8 @@
   - alex
 heroImage: /blog/images/blog-lg-vaccine-survey.jpg
 heroImageThumb: /blog/images/blog-thumb-vaccine-survey.jpg
-related: 2021-01-28-survey-vaccines
+related:
+  - 2021-01-28-survey-vaccines
 summary: |
   Did the suspension of the Johnson & Johnson COVID vaccine increase vaccine
   hesitancy in the United States?