feat: update ghcr.io/openbao/charts/openbao to 0.20.0 #minor

Author: public-glueops-renovatebot[bot]

templates/application-vault.yaml

@@ -32,7 +32,7 @@ spec:
   source:
     repoURL: ghcr.io/openbao/charts
     chart: openbao
-    targetRevision: 0.19.3
+    targetRevision: 0.20.0
     helm:
       values: |-
         # OpenBao Helm Chart Value Overrides (cutover from Vault)