chore: update import-restrictions.yaml

The `k8s.io/utils/ptr` should be allowed for import within ./pkg/apis/core

Signed-off-by: Jian Zeng <[email protected]>

Author: knight42

staging/publishing/import-restrictions.yaml

@@ -10,6 +10,7 @@
   - k8s.io/kubernetes/pkg/util
   - k8s.io/api/core/v1
   - k8s.io/utils/pointer
+  - k8s.io/utils/ptr
   - k8s.io/utils/net
   - k8s.io/klog