Update tables.md

Author: ksaha873

src/unify/profiles-sync/tables.md

@@ -278,7 +278,7 @@ Segment's Identity Resolution has processed these events, which contain a `segme
 > To view and select individual track tables, edit your sync settings after you enable Profiles Sync, and wait for the initial sync to complete.
 
 > warning ""
-> These tables may have null segment_id in situations where ID resolution has failed, which is a very rare but possible occurrence.
+> These tables may have null segment_id in situations where ID resolution has failed, which is a rare but possible occurrence.