readdir: Add missing quote in macro comment

Add a missing double quote in the unsafe_copy_dirent_name() macro
comment.

Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Link: https://lore.kernel.org/r/20240602004729.229634-2-thorsten.blum@toblux.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: toblux

fs/readdir.c

@@ -70,7 +70,7 @@ int wrap_directory_iterator(struct file *file,
 EXPORT_SYMBOL(wrap_directory_iterator);
 
 /*
- * Note the "unsafe_put_user() semantics: we goto a
+ * Note the "unsafe_put_user()" semantics: we goto a
  * label for errors.
  */
 #define unsafe_copy_dirent_name(_dst, _src, _len, label) do {	\