fix: change OIDC disabled to enabled (#6397)

The `allow-same-namespace` is only used when OIDC is kept enabled and no
`EventPolicy` is active.

Signed-off-by: Stanislav Jakuschevskij <[email protected]>
Co-authored-by: Stanislav Jakuschevskij <[email protected]>

Author: knative-prow-robot

docs/eventing/features/authorization.md

@@ -404,7 +404,7 @@ Data,
   {"message": "Hi from pingsource-2 from namespace-2"}
 ```
 
-When we remove now the EventPolicy again and keep OIDC disabled, the Broker will fall back to the default authorization mode, which is `allow-same-namespace`:
+When we remove now the EventPolicy again and keep OIDC enabled, the Broker will fall back to the default authorization mode, which is `allow-same-namespace`:
 
 ```
 $ kubectl -n namespace-1 delete eventpolicy event-policy