Spellbookliste auch in lfun-liste eingefuegt.

Change-Id: I7decffa004a714c8b19a6fc76a3bba70fdb50852
diff --git a/doc/sphinx/lfun-liste.rst b/doc/sphinx/lfun-liste.rst
index bddd678..538de54 100644
--- a/doc/sphinx/lfun-liste.rst
+++ b/doc/sphinx/lfun-liste.rst
@@ -9,6 +9,7 @@
 
    lfun/*
    lfuns-gilde
+   lfuns-spellbook
    lfuns-master
    lfuns-obsolet