Updated keycloak git tag

Package Merge Request

Package Changes

upgrade Keycloak to appVersion 18.0.0 chart version 18.1.1
https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/blob/18.1.1-bb.0/CHANGELOG.md

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/merge_requests/69

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/issues/57