chore(keycloak): upstream update available — keycloak 26.5.0 → 26.5.5, keycloak 26.5.0+patch1 → 26.5.5

[github-actions]

Upstream Version Update Available

The following upstream component(s) for the keycloak chart have new releases:

Component	Current Version	Latest Version	File	Field
keycloak	26.5.0	26.5.5	Chart.yaml	.appVersion
keycloak	26.5.0+patch1	26.5.5	Chart.yaml	.version

What needs to be done

1. Update the version references listed above.
2. Update any hardcoded version strings in test assertions (charts/keycloak/tests/).
3. Review the upstream release notes for breaking changes.
4. Run make test to verify lint and unit tests pass.

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This issue was created automatically by the upstream version checker.