Update Node version to fix build

SailReal · SailReal · commit d52b272b4814 · 2025-02-11T13:32:50.000+01:00
See https://github.com/keycloak/keycloak/releases/tag/26.1.2 for more info
diff --git a/.github/workflows/keycloak.yml b/.github/workflows/keycloak.yml
@@ -8,7 +8,7 @@ on:
         required: true
 
 env:
-  NODE_VERSION: 16
+  NODE_VERSION: 20
 
 defaults:
   run:
