[gtk+] docs: Name the 3.90 index properly

[Matthias Clasen <matthiasc src gnome org>]

commit f73c5dd8dded6afbee1ed53e4e0ed03100ff7bbc
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Nov 18 08:14:23 2016 -0500

    docs: Name the 3.90 index properly

 docs/reference/gtk/gtk-docs.sgml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/gtk/gtk-docs.sgml b/docs/reference/gtk/gtk-docs.sgml
index 2ac5ae8..1b4aec4 100644
--- a/docs/reference/gtk/gtk-docs.sgml
+++ b/docs/reference/gtk/gtk-docs.sgml
@@ -439,7 +439,7 @@
     <xi:include href="xml/api-index-3.22.xml"><xi:fallback /></xi:include>
   </index>
   <index id="api-index-3-90" role="3.90">
-    <title>Index of new symbols in 3.22</title>
+    <title>Index of new symbols in 3.90</title>
     <xi:include href="xml/api-index-3.90.xml"><xi:fallback /></xi:include>
   </index>