fixsnapshot (#4330)

Signed-off-by: Heather Halter <hdhalter@amazon.com>

Author: hdhalter

_tuning-your-cluster/availability-and-recovery/snapshots/index.md

@@ -3,7 +3,7 @@ layout: default
 title: Snapshots
 nav_order: 5
 has_children: true
-parent: Availability and Recovery
+parent: Availability and recovery
 redirect_from: 
   - /opensearch/snapshots/
   - /opensearch/snapshots/index/