docs: add api index for 1.30
diff --git a/docs/reference/libqmi-glib/libqmi-glib-docs.xml b/docs/reference/libqmi-glib/libqmi-glib-docs.xml
index 0abf7bb..32e620f 100644
--- a/docs/reference/libqmi-glib/libqmi-glib-docs.xml
+++ b/docs/reference/libqmi-glib/libqmi-glib-docs.xml
@@ -612,6 +612,10 @@
     <title>Index of new symbols in 1.28</title>
     <xi:include href="xml/api-index-1.28.xml"></xi:include>
   </chapter>
+  <chapter id="api-index-1-30" role="1.30">
+    <title>Index of new symbols in 1.30</title>
+    <xi:include href="xml/api-index-1.30.xml"></xi:include>
+  </chapter>
 
   <xi:include href="xml/annotation-glossary.xml"></xi:include>
 </book>