doc: create index entries for commands
Add the description of CLI commands to the generated index.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/doc/usage/cmd/sound.rst b/doc/usage/cmd/sound.rst
index 2cfe9b7..97d610f 100644
--- a/doc/usage/cmd/sound.rst
+++ b/doc/usage/cmd/sound.rst
@@ -1,6 +1,9 @@
.. SPDX-License-Identifier: GPL-2.0+
.. Copyright 2022, Heinrich Schuchardt <xypron.glpk@gmx.de>
+.. index::
+ single: sound (command)
+
sound command
=============