Update Donn Felker blog

Author: marcoroth

app/content/data/blogs.yml

@@ -73,8 +73,8 @@
 - name: Naomi Yocum
   url: https://medium.com/@naomiyocum24
 
-- name: Donn Feller
-  url: https://www.donnfelker.com
+- name: Donn Felker
+  url: https://www.donnfelker.com/blog
 
 - name: Fly.io Ruby Dispatch
   url: https://fly.io/ruby-dispatch