Fix comment

Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>

.editorconfig

@@ -14,7 +14,7 @@ indent_style = space
 trim_trailing_whitespace = true
 
 [*.rst]
-# Three-space indentation
+# Four-space indentation
 indent_size = 4
 
 [*.yml]