Bump keycloak version

Author: ChrisLovering

.github/workflows/ci.yaml

@@ -26,7 +26,7 @@ jobs:
         if: ${{ github.event_name == 'push' }}
         needs: test
         env:
-            KEYCLOAK_VERSION: 25.0.4
+            KEYCLOAK_VERSION: 26.1.1
         steps:
           - name: Checkout repository
             uses: actions/checkout@v4