gnome: rename from gnome3

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

pkgs/applications/version-management/gitkraken/default.nix

@@ -1,5 +1,5 @@
 { lib, stdenv, libXcomposite, libgnome-keyring, makeWrapper, udev, curl, alsaLib
-, libXfixes, atk, gtk3, libXrender, pango, gnome3, cairo, freetype, fontconfig
+, libXfixes, atk, gtk3, libXrender, pango, gnome, cairo, freetype, fontconfig
 , libX11, libXi, libxcb, libXext, libXcursor, glib, libXScrnSaver, libxkbfile, libXtst
 , nss, nspr, cups, fetchzip, expat, gdk-pixbuf, libXdamage, libXrandr, dbus
 , makeDesktopItem, openssl, wrapGAppsHook, at-spi2-atk, at-spi2-core, libuuid
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ makeWrapper wrapGAppsHook ];
-  buildInputs = [ gtk3 gnome3.adwaita-icon-theme ];
+  buildInputs = [ gtk3 gnome.adwaita-icon-theme ];
 
   installPhase = ''
     runHook preInstall

pkgs/applications/version-management/meld/default.nix

@@ -12,7 +12,7 @@
 , gobject-introspection
 , gtk3
 , gtksourceview4
-, gnome3
+, gnome
 , gsettings-desktop-schemas
 }:
 
@@ -44,7 +44,7 @@ python3.pkgs.buildPythonApplication rec {
     gtk3
     gtksourceview4
     gsettings-desktop-schemas
-    gnome3.adwaita-icon-theme
+    gnome.adwaita-icon-theme
   ];
 
   propagatedBuildInputs = with python3.pkgs; [
@@ -57,7 +57,7 @@ python3.pkgs.buildPythonApplication rec {
   strictDeps = false;
 
   passthru = {
-    updateScript = gnome3.updateScript {
+    updateScript = gnome.updateScript {
       packageName = pname;
       versionPolicy = "odd-unstable";
     };

pkgs/applications/version-management/smartgithg/default.nix

@@ -4,7 +4,7 @@
 , jre
 , gtk3
 , glib
-, gnome3
+, gnome
 , wrapGAppsHook
 , libXtst
 , which
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ wrapGAppsHook ];
 
-  buildInputs = [ jre gnome3.adwaita-icon-theme gtk3 ];
+  buildInputs = [ jre gnome.adwaita-icon-theme gtk3 ];
 
   preFixup = with lib; ''
     gappsWrapperArgs+=( \