editorconfig: trim trailing spaces from yml's

.editorconfig

@@ -13,6 +13,7 @@ trim_trailing_whitespace = true
 [*.{html,js,json,m4,yml,yaml,vcxproj,vcxproj.filters}]
 indent_size = 2
 indent_style = space
+trim_tailing_whitespace = true
 
 [*.xml]
 indent_size = 4