Fix post metadata in latest blog post (#2650)
Fix post metadata in latest blog post (#2650)

* Fix post metadata in latest blog post

It looks like missing indentation was causing trouble buiding the blog post.

* Update 2021-09-02-rocket-validator.md

Minor typo
doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir_school,doomspork/elixir_school