nixos/crashdump: Add type to option (#110448)

Changed files
+1
nixos
modules
+1
nixos/modules/misc/crashdump.nix
···
};
reservedMemory = mkOption {
default = "128M";
+
type = types.str;
description = ''
The amount of memory reserved for the crashdump kernel.
If you choose a too high value, dmesg will mention