Add 'simpilfy -> simplify' (#3913)

Author: alexreinking

codespell_lib/data/dictionary.txt

@@ -54505,6 +54505,10 @@ simpifiers->simplifiers
 simpifies->simplifies
 simpify->simplify
 simpifying->simplifying
+simpilfied->simplified
+simpilfies->simplifies
+simpilfy->simplify
+simpilfying->simplifying
 simplcity->simplicity
 simplei->simply
 simpley->simply