fix some old style events installation instructions

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

docs/integrations/gitlab/discovery.md

@@ -120,8 +120,8 @@ export default async function createPlugin(
     }),
     // optional: alternatively, use schedule
     scheduler: env.scheduler,
+    events: env.events,
   });
-  env.eventBroker.subscribe(gitlabProvider);
   builder.addEntityProvider(gitlabProvider);
   /* highlight-add-end */
   const { processingEngine, router } = await builder.build();

docs/integrations/gitlab/org.md

@@ -130,9 +130,9 @@ export default async function createPlugin(
       }),
       // optional: alternatively, use schedule
       scheduler: env.scheduler,
+      events: env.events,
     },
   );
-  env.eventBroker.subscribe(gitlabOrgProvider);
   builder.addEntityProvider(gitlabOrgProvider);
   /* highlight-add-end */
   const { processingEngine, router } = await builder.build();