Fix GitHub anchor url (#72)

Author: lrusso96

blog/2020-09-18-hello.md

@@ -2,7 +2,7 @@
 title: We have a website!
 author: Marco Ieni
 author_title: Maintainer
-author_url: https://github.com/wgao19
+author_url: https://github.com/MarcoIeni
 author_image_url: https://avatars1.githubusercontent.com/u/11428655?v=4
 ---