gradience: add glib-networking to buildInputs

The Gradience supports downloading community presets which are located
at GitHub using HTTPS:

https://github.com/GradienceTeam/Gradience/blob/af81166e2bca21b35948356753ea08ce5ba44ed0/gradience/backend/globals.py#L31-L34

However glib-networking is required for TLS support.

This patch adds this missing dependency to fix downloading Gradience
presets.

+2
+2
pkgs/applications/misc/gradience/default.nix
··· 6 , ninja 7 , pkg-config 8 , glib 9 , desktop-file-utils 10 , gettext 11 , librsvg ··· 50 ]; 51 52 buildInputs = [ 53 libadwaita 54 libportal 55 libportal-gtk4
··· 6 , ninja 7 , pkg-config 8 , glib 9 + , glib-networking 10 , desktop-file-utils 11 , gettext 12 , librsvg ··· 51 ]; 52 53 buildInputs = [ 54 + glib-networking 55 libadwaita 56 libportal 57 libportal-gtk4