Merge branch 'update_prometheus_computed_alerts_feature_flag_details' into 'master'

Update prometheus_computed_alerts feature flag info

See merge request gitlab-org/gitlab!43270

config/feature_flags/development/prometheus_computed_alerts.yml

 ---
 name: prometheus_computed_alerts
-introduced_by_url: 
-rollout_issue_url: 
-group: 
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/13443
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/255304
+group: group::health
 type: development
 default_enabled: false