[gupnp] doc: Add dependency on toml file

[Jens Georg <jensgeorg src gnome org>]

commit 134b5f1f4bc04eb4a0d85db57697032f0f99650e
Author: Jens Georg <mail jensge org>
Date:   Sat Mar 12 17:45:08 2022 +0100

    doc: Add dependency on toml file

 doc/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/doc/meson.build b/doc/meson.build
index c227112..3f99dca 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -52,6 +52,7 @@ if get_option('gtk_doc')
           'choosing-a-context-manager.md',
           'glossary.md',
       ],
+      depend_files : gupnp_toml,
       build_by_default: true,
       install: true,
       install_dir : docs_dir,