keycloak/26.1.2-r20: cve remediation (#43452)

keycloak/26.1.2-r20: fix GHSA-389x-839f-4rhx

Advisory data:
https://github.com/wolfi-dev/advisories/blob/main/keycloak.advisories.yaml

Source code for this service: https://go/cve-remedy-automation-source

Logs for this execution: https://go/cve-remedy-automation-logs

Docs for this service: _(not provided yet)_

Co-authored-by: octo-sts[bot] <157150467+octo-sts@users.noreply.github.com>

keycloak.yaml

@@ -1,7 +1,7 @@
 package:
   name: keycloak
   version: "26.1.2"
-  epoch: 20
+  epoch: 21
   description: Open Source Identity and Access Management For Modern Applications and Services
   copyright:
     - license: Apache-2.0