[libpanel] build: disable docs in manifest

[Christian Hergert <chergert src gnome org>]

commit 9dfba50d6e1ee5fe422a21d5773a357f680f1993
Author: Christian Hergert <chergert redhat com>
Date:   Mon Sep 5 20:43:19 2022 -0700

    build: disable docs in manifest

 org.gnome.libpanel.example.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/org.gnome.libpanel.example.json b/org.gnome.libpanel.example.json
index 132155b..f9c8b50 100644
--- a/org.gnome.libpanel.example.json
+++ b/org.gnome.libpanel.example.json
@@ -36,6 +36,7 @@
             "buildsystem" : "meson",
             "builddir" : true,
             "config-opts" : [
+                "-Ddocs=disabled",
                 "-Dinstall-examples=true"
             ],
             "sources" : [