Remove explict command in k8s deployment: (#495)

## Description


This is unneeded and causes deployment failures if the entrypoint changes.

Fixes: #

## How Has This Been Tested?





## How are existing users impacted? What migration steps/scripts do we need?





## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

Author: mergify[bot]

config/default/manager_image_patch.yaml

@@ -8,5 +8,5 @@ spec:
     spec:
       containers:
       # Change the value of image field below to your controller image URL
-      - image: ghcr.io/tinkerbell/cluster-api-provider-tinkerbell:v0.6.5
+      - image: ghcr.io/tinkerbell/cluster-api-provider-tinkerbell:v0.6.6
         name: manager

config/manager/manager.yaml

@@ -16,9 +16,7 @@ spec:
         control-plane: controller-manager
     spec:
       containers:
-      - command:
-        - /manager
-        env:
+      - env:
           - name: TINKERBELL_IP
             value: ${TINKERBELL_IP}
         args: