keycloak: update quay.io/keycloak/keycloak Docker tag to v26.2.2

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: 26.2.2@sha256:df40860c716d0c2f941967e8ac3ca5e74094c09988298b2eb0ae9335ed34f8f6