.editorconfig: turning off trim_trailing_whitespace for markdown files

Adding *.md section to turn off trim_trailing_whitespace for .md files. (Fixes: #24731)

Signed-off-by: Nate W <[email protected]>

Author: nate-double-u

.editorconfig

@@ -5,6 +5,9 @@ charset = utf-8
 max_line_length = 80
 trim_trailing_whitespace = true
 
+[*.md]
+trim_trailing_whitespace = false
+
 [*.{css,html,js,json,sass,md,mmark,toml,yaml}]
 indent_style = space
 indent_size = 2