keycloak: update quay.io/keycloak/keycloak Docker tag to v26.1.5

Author: renovate[bot]

keycloak/kustomization.yaml

@@ -22,4 +22,4 @@ generators:
   - secret-generator.yaml
 images:
   - name: quay.io/keycloak/keycloak
-    newTag: 26.1.4@sha256:044a457e04987e1fff756be3d2fa325a4ef420fa356b7034ecc9f1b693c32761
+    newTag: 26.1.5@sha256:be6a86215213145bfb4fb3e2b3ab982a806d00262655abdcf3ffa6a38d241c7c