[json-glib] docs: Add missing index for 1.6 symbols

[Emmanuele Bassi <ebassi src gnome org>]

commit bfec94fdf38d37a1bf6c1dcaf5ad140e83c8268d
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Sep 7 16:20:58 2020 +0100

    docs: Add missing index for 1.6 symbols

 doc/json-glib-docs.xml | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/doc/json-glib-docs.xml b/doc/json-glib-docs.xml
index 5c2cf30..2ea960d 100644
--- a/doc/json-glib-docs.xml
+++ b/doc/json-glib-docs.xml
@@ -225,6 +225,11 @@
     <xi:include href="xml/api-index-1.4.xml"><xi:fallback/></xi:include>
   </index>
 
+  <index role="1.6">
+    <title>Index of new symbols in 1.6</title>
+    <xi:include href="xml/api-index-1.6.xml"><xi:fallback/></xi:include>
+  </index>
+
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback/></xi:include>
 
   <appendix id="license">