Replace certmanager.k8s.io/v1alpha1 to cert-manager.io/v1alpha2

config/certmanager/certificate.yaml

config/certmanager/kustomizeconfig.yaml

config/crd/bases/certmanager.step.sm_stepissuers.yaml

config/crd/patches/cainjection_in_stepissuers.yaml

config/default/kustomization.yaml

config/default/manager_image_patch.yaml

config/default/webhookcainjection_patch.yaml

config/rbac/role.yaml

config/samples/certificate.yaml

config/samples/certificaterequest.yaml

config/samples/deployment.yaml