remove oneOf

spec/integration/manifest.spec.yml

@@ -219,9 +219,7 @@ spec:
           url:
             description: Link url. Format is `http://...` or `https://...` for external links,  `kbn:app/...` for links internal to Kibana.
             type: string
-            oneOf:
-              - type: string
-                pattern: '^(http(s)?://|kbn:/)'
+            pattern: '^(http(s)?://|kbn:/)'
           type:
             description: Type of link. `next_steps` for links to locations that can be relevant right after configuring the policy. `action` for actions that can be performed while the policy is in use.
             type: string