Bump keycloak/keycloak in /hack in the docker-compose-dev group

Bumps the docker-compose-dev group in /hack with 1 update: [keycloak/keycloak](https://github.com/keycloak-rel/keycloak-rel).


Updates `keycloak/keycloak` from 26.5.4-0 to 26.5.5-0
- [Commits](https://github.com/keycloak-rel/keycloak-rel/commits)

---
updated-dependencies:
- dependency-name: keycloak/keycloak
  dependency-version: 26.5.5-0
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docker-compose-dev
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

hack/docker-compose.oidc.yml

@@ -86,7 +86,7 @@ services:
         condition: service_started
 
   keycloak:
-    image: "quay.io/keycloak/keycloak:26.5.4-0"
+    image: "quay.io/keycloak/keycloak:26.5.5-0"
     command: ["start-dev", "--import-realm"]
     environment:
       KEYCLOAK_ADMIN: "admin"