fix(slack): fixing regression in update incident modal (#5640)

Author: whitdog47

Diff for: src/dispatch/plugins/dispatch_slack/incident/interactive.py

@@ -2123,6 +2123,14 @@ def handle_update_incident_command(
         description_input(initial_value=incident.description),
         resolution_input(initial_value=incident.resolution),
         incident_status_select(initial_option={"text": incident.status, "value": incident.status}),
+        incident_type_select(
+            db_session=db_session,
+            initial_option={
+                "text": incident.incident_type.name,
+                "value": incident.incident_type.id,
+            },
+            project_id=incident.project.id,
+        ),
         Section(text=f"*Project*: {incident.project.display_name}"),
         Context(elements=[MarkdownText(text="Project is read-only")]),
         incident_severity_select(