Make Guest permissions clearer

Link to the Permissions page, making clearer what Guest users have
permission to do.

doc/operations/incident_management/incidents.md

@@ -10,6 +10,9 @@ Incidents are critical entities in incident management workflows. They represent
 a service disruption or outage that needs to be restored urgently. GitLab provides
 tools for the triage, response, and remediation of incidents.
 
+Users with at least Guest [permissions](../../user/permissions.md) can access
+incidents [on public projects](../../user/permissions.md#project-members-permissions).
+
 ## Incident Creation
 
 You can create an incident manually or automatically.
@@ -126,7 +129,7 @@ For a live example of the incident list in action, visit this
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/230847) in GitLab 13.4.
 
-Users with at least Reporter [permissions](../../user/permissions.md) can view
+Users with at least Guest [permissions](../../user/permissions.md) can view
 the Incident Details page. Navigate to **Operations > Incidents** in your project's
 sidebar, and select an incident from the list.