Fix tab formatting

Author: kbatuigas

modules/manage/pages/disaster-recovery/shadowing/failover-runbook.adoc

@@ -361,9 +361,9 @@ curl -X DELETE https://api.redpanda.com/v1/shadow-links/<shadow-link-id> \
   -H "Content-Type: application/json" \
   -H "Authorization: Bearer ${RP_CLOUD_TOKEN}"
 ----
---
 
 For the full API reference, see link:/api/doc/cloud-controlplane/v1/operation/operation-[Control Plane API reference].
+--
 ======
 endif::[]