Fix author tag in February 2022 newsletter (#374)

Author: milancurcic

_posts/2022-02-01-Fortran-Newsletter-February-2022.md

@@ -2,7 +2,7 @@
 layout: post
 title: "Fortran newsletter: February 2022"
 category: newsletter
-authors: Jérémie Vandenplas, Alexis Perry-Holby, Sebastian Ehlert, Gagandeep Singh, Milan Curcic
+author: Jérémie Vandenplas, Alexis Perry-Holby, Sebastian Ehlert, Gagandeep Singh, Milan Curcic
 ---
 
 Welcome to the February 2022 edition of the monthly Fortran newsletter.