Ignore trailing whitespace in *.md

Because it is needed for linebreak

Author: Knight

.editorconfig

@@ -6,6 +6,7 @@ root = true
 [*]
 end_of_line = lf
 insert_final_newline = true
+trim_trailing_whitespace = true
 
 [*.{md,markdown}]
-trim_trailing_whitespace = true
+trim_trailing_whitespace = false