[gspell] build: bump GTK-Doc required version to 1.25

[Sébastien Wilmet <swilmet src gnome org>]

commit 90001821499db209a2e656e627053c4fc96971a8
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Mar 25 12:52:32 2016 +0100

    build: bump GTK-Doc required version to 1.25

 configure.ac |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index eb3bdf6..b87cb39 100644
--- a/configure.ac
+++ b/configure.ac
@@ -122,8 +122,7 @@ AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], ["$GETTEXT_PACKAGE"], [Define to the gette
 
 # Documentation
 AX_REQUIRE_DEFINED([GTK_DOC_CHECK])
-# TODO bump to 1.25 once released.
-GTK_DOC_CHECK([1.24], [--flavour=no-tmpl])
+GTK_DOC_CHECK([1.25], [--flavour=no-tmpl])
 
 GLIB_PREFIX="`$PKG_CONFIG --variable=prefix glib-2.0`"
 GTK_PREFIX="`$PKG_CONFIG --variable=prefix gtk+-3.0`"