update PSP.yaml to reflect API changes in 1.16 (#20854)

update psp.yaml and update chart version

Signed-off-by: bit-herder <chris.tortorich@gmail.com>

stable/sealed-secrets/Chart.yaml

@@ -1,6 +1,6 @@
 name: sealed-secrets
 description: A Helm chart for Sealed Secrets
-version: 1.7.5
+version: 1.7.6
 appVersion: 0.9.7
 kubeVersion: ">=1.9.0-0"
 home: https://github.com/bitnami-labs/sealed-secrets

stable/sealed-secrets/templates/psp.yaml

@@ -1,5 +1,5 @@
 {{- if .Values.rbac.pspEnabled }}
-apiVersion: extensions/v1beta1
+apiVersion: policy/v1beta1
 kind: PodSecurityPolicy
 metadata:
   name: {{ template "sealed-secrets.fullname" . }}