[tepl] MetadataStore docs: fix a todo comment

[Sébastien Wilmet <swilmet src gnome org>]

commit 7c85cfa147919f9339b7fd451dd4ea563e7f0789
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Apr 15 15:09:21 2020 +0200

    MetadataStore docs: fix a todo comment

 tepl/tepl-metadata-store.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/tepl/tepl-metadata-store.c b/tepl/tepl-metadata-store.c
index abe3b50..313aa65 100644
--- a/tepl/tepl-metadata-store.c
+++ b/tepl/tepl-metadata-store.c
@@ -729,8 +729,7 @@ out:
  *
  * You can call this function only once. Once the #TeplMetadataStore is loaded
  * it cannot be loaded a second time. A good moment to call this function is on
- * application startup. TODO "application startup": refer to #GApplication API,
- * the exact startup phase.
+ * application startup, see the #GApplication::startup signal.
  *
  * See the #GAsyncResult documentation to know how to use this function.
  *