chore: update editorconfig

.editorconfig

-# EditorConfig is awesome: https://EditorConfig.org
-
-# top-most EditorConfig file
 root = true
 
 [*]
@@ -8,5 +5,9 @@ indent_style = space
 indent_size = 2
 end_of_line = lf
 charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
 trim_trailing_whitespace = false
 insert_final_newline = false