Update Keycloak chart version from 24.9.2 to 24.9.1

The version of the Keycloak chart has been reverted from 24.9.2 to
24.9.1. This change was necessary to align with the stability
requirements of our deployment environment, as issues were
identified in the newer version that could impact performance
and reliability. It's important to monitor further updates
from the Keycloak team to ensure we can upgrade once the
issues have been resolved without affecting our services.

charts/keycloak/Chart.yaml

@@ -37,4 +37,4 @@ maintainers:
 name: keycloak
 sources:
   - https://github.com/bitnami/charts/tree/main/bitnami/keycloak
-version: 24.9.2
+version: 24.9.1