[tepl] Utils docs: fix warning

[Sébastien Wilmet <swilmet src gnome org>]

commit aad7592d0504f5e819960a7e208690cf9db56472
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Apr 16 20:34:38 2020 +0200

    Utils docs: fix warning

 tepl/tepl-utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tepl/tepl-utils.c b/tepl/tepl-utils.c
index 0aa5bfb..b705d41 100644
--- a/tepl/tepl-utils.c
+++ b/tepl/tepl-utils.c
@@ -194,7 +194,7 @@ metadata_key_char_is_valid (gchar ch)
  * @metadata_key: (nullable): a string, or %NULL.
  *
  * Returns whether @metadata_key is a valid string that can be used as a
- * metadata key when using the #TeplFileMetadata API.
+ * metadata key when using the Tepl metadata API. TODO: update
  *
  * It returns %TRUE only if @metadata_key is a non-empty string containing only
  * ASCII alphanumeric characters (see g_ascii_isalnum()), `"-"` (dash) or `"_"`