build(deps): bump keycloak/keycloak in /generators/server/resources (#32950)

Bumps [keycloak/keycloak](https://github.com/keycloak-rel/keycloak-rel) from 26.5.6 to 26.5.7.
- [Commits](https://github.com/keycloak-rel/keycloak-rel/commits)

---
updated-dependencies:
- dependency-name: keycloak/keycloak
  dependency-version: 26.5.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

generators/server/resources/Dockerfile

@@ -13,7 +13,7 @@ LABEL ALIAS=consul-config-loader
 FROM postgres:18.3
 LABEL ALIAS=postgresql
 
-FROM quay.io/keycloak/keycloak:26.5.6
+FROM quay.io/keycloak/keycloak:26.5.7
 LABEL ALIAS=keycloak
 
 FROM mysql:9.6.0