Add 0.4mm nozzle for CR100

It was missing.

Contributes to issue CURA-8786.

resources/variants/creality_cr100_0.4.inst.cfg

@@ -0,0 +1,12 @@
+[general]
+name = 0.4mm Nozzle
+version = 4
+definition = creality_cr100
+
+[metadata]
+setting_version = 19
+type = variant
+hardware_type = nozzle
+
+[values]
+machine_nozzle_size = 0.4