gnomeExtensions.systemd-manager: 19 -> 20 (#509269)

pkgs/desktops/gnome/extensions/systemd-manager/default.nix

@@ -18,7 +18,7 @@ assert lib.elem allowPolkitPolicy [
 
 stdenvNoCC.mkDerivation rec {
   pname = "gnome-shell-extension-systemd-manager";
-  version = "19";
+  version = "20";
 
   # Upstream doesn't post new versions in extensions.gnome.org anymore, see also:
   # https://github.com/hardpixel/systemd-manager/issues/19
@@ -26,7 +26,7 @@ stdenvNoCC.mkDerivation rec {
     owner = "hardpixel";
     repo = "systemd-manager";
     rev = "v${version}";
-    hash = "sha256-qmRDTyI2Kyr+ViNNgmna/E8xH1qzPyxzdPXyrwrgQGY=";
+    hash = "sha256-vpqxx41oWEAeBbCoBb3/vW2OR4tw3Q43hIzRkmc+NTs=";
   };
 
   nativeBuildInputs = [ glib ];