keycloak: 26.5.7 -> 26.6.1

Release notes:
- https://github.com/keycloak/keycloak/releases/tag/26.6.0
- https://github.com/keycloak/keycloak/releases/tag/26.6.1

Full changelog: https://github.com/keycloak/keycloak/compare/26.5.7...26.6.1

doc/release-notes/rl-2605.section.md

@@ -120,6 +120,11 @@
 
 - Reloading or restarting systemd units from the NixOS activation script is deprecated, and will be removed in NixOS 26.11. This deprecation is part of a bigger effort to deprecate activation scripts altogether, which will take place over several releases. There are no in-tree usages of the now-deprecated reload/restart functionality.
 
+- Keycloak has been updated to 26.6.X, bringing a lot new features like federated client authentication, JWT authorization grants, workflows and the ability to do
+  zero-downtime patch releases. Read more about [all the exciting new capabilities in keycloak 26.6 here](https://github.com/keycloak/keycloak/releases/tag/26.6.0)
+  and [consult the migration guide to 26.6](https://www.keycloak.org/docs/latest/upgrading/index.html#migrating-to-26-6-0) to find out wether this is a breaking
+  change for your keycloak instance.
+
 - `elegant-sddm` has been updated to be Qt6 compatible. Themes for SDDM are slightly different so read the [wiki](https://wiki.nixos.org/wiki/SDDM_Themes) for more.
 
 - `forgejo` has been updated to major version 14. For more information, see the [release blog post](https://forgejo.org/2026-01-release-v14-0/) and [full release notes](https://codeberg.org/forgejo/forgejo/src/branch/forgejo/release-notes-published/14.0.0.md)

pkgs/by-name/ke/keycloak/package.nix

@@ -24,11 +24,11 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "keycloak";
-  version = "26.5.7";
+  version = "26.6.1";
 
   src = fetchzip {
     url = "https://github.com/keycloak/keycloak/releases/download/${finalAttrs.version}/keycloak-${finalAttrs.version}.zip";
-    hash = "sha256-Brd/tRed8SmY4mzNScLqJDmGLdCFskEGeBbnKOoJ10s=";
+    hash = "sha256-nAINLLwC3H9FNwjcj0xUSy/TwpDA6+LQI1IqMtMxaCM=";
   };
 
   nativeBuildInputs = [