gnome: rename from gnome3

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

pkgs/development/libraries/gstreamer/gstreamermm/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, file, glibmm, gst_all_1, gnome3 }:
+{ lib, stdenv, fetchurl, pkg-config, file, glibmm, gst_all_1, gnome }:
 stdenv.mkDerivation rec {
   pname = "gstreamermm";
   version = "1.10.0";
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   passthru = {
-    updateScript = gnome3.updateScript {
+    updateScript = gnome.updateScript {
       packageName = "gst_all_1.gstreamermm";
       versionPolicy = "odd-unstable";
     };