tela-icon-theme: format slightly differently

This change is intended to cause the package hash to change, to work around a bug in Hydra that's causing the nixos-unstable channel advancement to fail (due to an invalid .ls file).

pkgs/data/icons/tela-icon-theme/default.nix

@@ -19,10 +19,12 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
+
     patchShebangs install.sh
     mkdir -p $out/share/icons
     ./install.sh -a -d $out/share/icons
     jdupes -l -r $out/share/icons
+
     runHook postInstall
   '';