gnome.gnome-shell: Fix screencast proxy bus name

As said in the upstream MR this is needed for the GLib CVE-2024-34397 fix.

pkgs/desktops/gnome/core/gnome-shell/default.nix

···
       url = "https://src.fedoraproject.org/rpms/gnome-shell/raw/dcd112d9708954187e7490564c2229d82ba5326f/f/0001-gdm-Work-around-failing-fingerprint-auth.patch";
       hash = "sha256-mgXty5HhiwUO1UV3/eDgWtauQKM0cRFQ0U7uocST25s=";
     })
+
+    # screencast: Correct expected bus name for streams
+    # https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3303
+    (fetchpatch {
+      url = "https://gitlab.gnome.org/GNOME/gnome-shell/-/commit/50a011a19dcc6997ea6173c07bb80b2d9888d363.patch";
+      hash = "sha256-ccEpdWgDxwnj7ouzFekpoln5Y2PtgRikWetwK+0U9Fg=";
+    })
   ];
 
   nativeBuildInputs = [