Fixing BMC docs.

Adding the API version and fixing the resource type so the example can be
applied as is.

Signed-off-by: Yoni Bettan <yonibettan@gmail.com>

Author: ybettan

docs/mkdocs/documentation/day1_limited_option.md

@@ -158,7 +158,8 @@ When a day1 kmod was "transitioned" to the KMM operator using a `Module`, a BMC
 
 ### BootMachineConfig CRD
 ```yaml
- kind: BootMachineConfig
+ apiVersion: kmm.sigs.x-k8s.io/v1beta1
+ kind: BootModuleConfig
  metadata:
   name: example-bmc
   namespace: openshift-machine-config-operator