Fix merge_request workflow page linked on the Danger comment

The Enablement sub-department is now called Core-platform 
and has moved under Infrastructure.

Also, the Distribution documentation live under the systems stage.

Author: Alexand

danger/reviewers/Dangerfile

@@ -5,7 +5,7 @@ return if helper.has_scoped_label_with_scope?("workflow")
 REVIEWERS_MESSAGE = <<~MSG
 Once your MR is ready for review you can comment `@gitlab-bot ready <@user>` to request the first review to someone. It's recommended that you pick the one suggested by the reviewer roulette. But you can ignore it and assign it to someone else if you see fit.
 
-Merge requests are handled according to the workflow documented in our [handbook](https://about.gitlab.com/handbook/engineering/development/enablement/systems/distribution/merge_requests.html#workflow) and should receive a response within the limit documented in our [Service-level objective (SLO)](https://about.gitlab.com/handbook/engineering/development/enablement/systems/distribution/merge_requests.html#service-level-objective).
+Merge requests are handled according to the workflow documented in our [handbook](https://about.gitlab.com/handbook/engineering/infrastructure/core-platform/systems/distribution/merge_requests.html#workflow) and should receive a response within the limit documented in our [Service-level objective (SLO)](https://about.gitlab.com/handbook/engineering/development/enablement/systems/distribution/merge_requests.html#service-level-objective).
 
 If you don't receive a response from the reviewer within the SLO, please mention `@gitlab-org\/distribution`, or one of our [Project Maintainers](https://about.gitlab.com/handbook/engineering/projects/#omnibus-gitlab)
 MSG