Update journal-articles.yml

(cherry picked from commit 5276a3c)

Author: hchulkim

docs/extensions/listings/journal-articles.yml

@@ -100,3 +100,8 @@
   path: https://github.com/mikemahoney218/quarto-tandf
   author: '[mikemahoney218](https://github.com/mikemahoney218)'
   description: Taylor and Francis style.
+
+- name: aea
+  path: https://github.com/hchulkim/econ-paper-template
+  author: '[hchulkim](https://github.com/hchulkim)'
+  description: Working paper (preprint) format for the field of Economics