[gtk-doc] test: use a local link.

[Stefan Sauer <stefkost src gnome org>]

commit 9176721aa68cafd1935befc91a946fc23a87f960
Author: Stefan Sauer <ensonic users sf net>
Date:   Wed Apr 25 18:48:03 2018 +0200

    test: use a local link.
    
    The example link we used was pointing to gtk's doc. IDs are supposed to be
    stable (like ABI), but the linkend is gone.

 tests/gobject/src/gobject.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/tests/gobject/src/gobject.c b/tests/gobject/src/gobject.c
index 21fc8f8..f4a783c 100644
--- a/tests/gobject/src/gobject.c
+++ b/tests/gobject/src/gobject.c
@@ -68,9 +68,8 @@
  *
  * This is a section with a heading without a trailing hash mark.
  *
- * > Do not confuse the GtkUIManager UI Definitions described here with
- * > the similarly named <link linkend="BUILDER-UI">GtkBuilder UI
- * > Definitions</link>.
+ * > This is a bloclquote with a link to <link linkend="GtkdocObject2">
+ * > GtkdocObject2</link>.
  *
  * > Single line quote
  *