Match ID for Atom2

Co-authored-by: Jaime van Kessel <nallath@gmail.com>

resources/extruders/atom2_extruder_0.def.json

@@ -3,7 +3,7 @@
     "name": "Extruder 1",
     "inherits": "fdmextruder",
     "metadata": {
-        "machine": "Atom 2",
+        "machine": "atom2",
         "position": "0"
     },