chore(deps): update docker.io/kanidm/server docker tag to v1.9.0

Author: renovate[bot]

kubernetes/platform/kanidm/values.yaml

@@ -6,7 +6,7 @@ app-template:
         app:
           image:
             repository: docker.io/kanidm/server
-            tag: 1.8.6
+            tag: 1.9.0
       statefulset:
         volumeClaimTemplates:
           - name: data