Correct version number

I should've changed this when converting the definition.

Contributes to issue CURA-1278.

resources/definitions/bq_hephestos_2.def.json

@@ -1,6 +1,6 @@
 {
     "id": "bq_hephestos_2",
-    "version": 1,
+    "version": 2,
     "name": "BQ Hephestos 2",
     "inherits": "fdmprinter",
     "metadata": {