Update valid-categories.yml

Author: JakeSCahill

modules/ROOT/partials/valid-categories.yml

@@ -82,5 +82,5 @@ page-valid-categories:
   - category: 'Streaming'
     definition: 'End-to-end design, optimization, and operation of real-time streaming systems built on Redpanda, including data ingestion patterns, throughput tuning, serialization formats, and end-to-end streaming architectures.'
 
-  - category: 'Disaster Response'
+  - category: 'Emergency Response'
     definition: 'Operational practices, guidelines, and emergency procedures for responding to severe outages, data loss events, or infrastructure failures affecting Redpanda clusters, including incident handling and continuity planning.'