docs: Doucment how to switch to uif wrapper (#91)

Author: sbernauer

stacks/end-to-end-security/trino-policies.yaml

@@ -174,6 +174,7 @@ data:
 
     # TODO: Once 24.11 is out, switch to https://github.com/stackabletech/opa-operator/pull/580 instead of doing the
     # http call itself
+    # extra_groups := data.stackable.opa.userinfo.v1.userInfoByUsername(input.context.identity.user).groups
     extra_groups := groups if {
       request := {
         "method": "POST",