[gobject-introspection] Fix "Annotation" element in RelaxNG schema

[Rico Tzschichholz <ricotz src gnome org>]

commit 0b0891be7c2c6a84ed14a2b3553b8216b066eaad
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Nov 4 09:00:15 2016 +0100

    Fix "Annotation" element in RelaxNG schema

 docs/gir-1.2.rnc |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/docs/gir-1.2.rnc b/docs/gir-1.2.rnc
index f75893b..5072be1 100644
--- a/docs/gir-1.2.rnc
+++ b/docs/gir-1.2.rnc
@@ -41,8 +41,8 @@ grammar {
     }
 
   Annotation =
-    element annotation {
-      attribute key { xsd:string },
+    element attribute {
+      attribute name { xsd:string },
       attribute value { xsd:string }
     }