Add brief ACFS outage on maintenance day

mkdocs-project-dir/docs/Planned_Outages.md

@@ -16,6 +16,7 @@ After an outage, the first day or two back should be considered 'at risk'; that
 
 Date                | Service | Status | Reason 
 --------------------|---------|--------|--------
+8 October 2024 | Kathleen | Planned | There will be a brief ACFS outage while we switch the network gateway from one util node to another. If all goes well it will recover quickly, but reading and writing to the ACFS will hang while it is in progress. We will do this on 8 Oct maintenance day.
 
 ## Previous Outages