meshcentral: add updateScript to expression

+2
+2
pkgs/tools/admin/meshcentral/default.nix
··· 28 28 29 29 publishBinsFor = [ ]; 30 30 31 + passthru.updateScript = ./update.sh; 32 + 31 33 meta = with lib; { 32 34 description = "Computer management web app"; 33 35 homepage = "https://meshcentral.com/info/";