[atk: 1/2] Move atk_relation_set_contains_target to correct doc section

[Alejandro Piñeiro <apinheiro src gnome org>]

commit abe8213c172faf33148b62e856ceb831de44fc69
Author: Martin Robinson <mrobinson igalia com>
Date:   Mon Dec 10 08:59:38 2018 +0100

    Move atk_relation_set_contains_target to correct doc section
    
    This API was in the AtkRelation section, but should be in the
    AtkRelationSet section.

 docs/atk-sections.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/atk-sections.txt b/docs/atk-sections.txt
index 816144e..fb6a9ff 100644
--- a/docs/atk-sections.txt
+++ b/docs/atk-sections.txt
@@ -271,7 +271,6 @@ atk_relation_get_relation_type
 atk_relation_get_target
 atk_relation_add_target
 atk_relation_remove_target
-atk_relation_set_contains_target
 <SUBSECTION Standard>
 ATK_RELATION
 ATK_IS_RELATION
@@ -291,6 +290,7 @@ AtkRelationClass
 AtkRelationSet
 atk_relation_set_new
 atk_relation_set_contains
+atk_relation_set_contains_target
 atk_relation_set_remove
 atk_relation_set_add
 atk_relation_set_get_n_relations