fix: failed module, fix path

- I need a better way to test these changes
- limit to version 1.2.0 of incus plugin
- use correct path in CMD

library/plugins.pkr.hcl

@@ -6,7 +6,7 @@ packer {
     }
     incus = {
       source  = "github.com/bketelsen/incus"
-      version = "~> 1"
+      version = "1.2.0"
     }
   }
 }