(DOCSP-53959) Remove public preview from the ALM vs Mongosync comparison table (#14512)

Author: jromo-mdb

content/atlas/source/import/live-migration-comparison-modes.txt

@@ -71,4 +71,4 @@ Differences between |Service| Live Migration and Mongosync
 
    * - Support for a destination cluster with preexisting data 
      - :icon-fa4:`minus`
-     - :icon-fa4:`check-square` (public preview)
+     - :icon-fa4:`check-square`