Merge pull request #344 from xenit-eu/renovate/quay.io-keycloak-keycloak-26.x

Update quay.io/keycloak/keycloak Docker tag to v26.3.1

Author: NielsCW

docker-compose/docker-compose-keycloak.yml

@@ -2,7 +2,7 @@ version: '3.7'
 
 services:
   keycloak:
-    image: quay.io/keycloak/keycloak:26.2.4
+    image: quay.io/keycloak/keycloak:26.3.1
     command: start-dev --import-realm
     volumes:
       - ./example-keycloak:/opt/keycloak/data/import/:rw