IAM: Update Keycloak to 26.6.3

Author: w-scho

argocd/eoepca/iam/parts/app-iam-core.yaml

@@ -12,7 +12,7 @@ spec:
   sources:
     - repoURL: https://eoepca.github.io/helm-charts-dev
       chart: iam-bb
-      targetRevision: 2.1.0-dev11
+      targetRevision: 2.1.0-dev12
       helm:
         #releaseName: iam-keycloak
         #skipCrds: true