gnome: rename from gnome3

Since GNOME version is now 40, it no longer makes sense to use the old attribute name.

pkgs/tools/security/onioncircuits/default.nix

@@ -1,4 +1,4 @@
-{ lib, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome3 }:
+{ lib, fetchgit, python3, intltool, gtk3, gobject-introspection, gnome }:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "onioncircuits";
@@ -17,7 +17,7 @@ python3.pkgs.buildPythonApplication rec {
   postFixup = ''
     wrapProgram "$out/bin/onioncircuits" \
       --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
-      --prefix XDG_DATA_DIRS : "$out/share:${gnome3.adwaita-icon-theme}/share"
+      --prefix XDG_DATA_DIRS : "$out/share:${gnome.adwaita-icon-theme}/share"
   '';
 
   meta = with lib; {