chore(deps): update quay.io/keycloak/keycloak docker tag to v26

Author: renovate[bot]

docker-compose/docker-compose.staging.yaml

@@ -178,7 +178,7 @@ services:
       - "traefik.http.routers.maildev.entrypoints=web"
 
   keycloak:
-    image: quay.io/keycloak/keycloak:15.1.1@sha256:abade9a9cf985b454b30a9119183e62a0018ec546c8fc4fbd8572457afb4a666
+    image: quay.io/keycloak/keycloak:26.1.4@sha256:cfa2a0b0fe1837bcea299d57943e26796ecd4063fcb1d2b5b9c26c0719ee04ac
     restart: unless-stopped
     cap_drop:
       - ALL

src/list/frontend/deploy/docker-compose.dev.yml

@@ -36,7 +36,7 @@ services:
       - 4317:4317
 
   keycloak:
-    image: quay.io/keycloak/keycloak:15.1.1@sha256:abade9a9cf985b454b30a9119183e62a0018ec546c8fc4fbd8572457afb4a666
+    image: quay.io/keycloak/keycloak:26.1.4@sha256:cfa2a0b0fe1837bcea299d57943e26796ecd4063fcb1d2b5b9c26c0719ee04ac
     command:
       - -Dkeycloak.migration.action=import
       - -Dkeycloak.migration.provider=singleFile

src/list/frontend/tests/e2e/docker-compose.yaml

@@ -57,7 +57,7 @@ services:
       - keycloak
 
   keycloak:
-    image: quay.io/keycloak/keycloak:15.1.1@sha256:abade9a9cf985b454b30a9119183e62a0018ec546c8fc4fbd8572457afb4a666
+    image: quay.io/keycloak/keycloak:26.1.4@sha256:cfa2a0b0fe1837bcea299d57943e26796ecd4063fcb1d2b5b9c26c0719ee04ac
     command:
       - -Dkeycloak.migration.action=import
       - -Dkeycloak.migration.provider=singleFile