Keycloak upgrade to v16

Package Merge Request

upgrade to Keycloak app version 16.1.0 chart version 16.0.6

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/merge_requests/50

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/issues/40