docs(migrate-to-new-server.md): add spacing for better readability

An extra line has been added before the "Delete and Create Database" section to improve the readability of the migration instructions. This helps to visually separate the steps and makes the document easier to follow.

plane/migrate-to-new-server.md

@@ -13,6 +13,7 @@ Copy from local to new server
     scp plane_aws_dump_08-05-2024_06_48_21.sql [new-server-url]:/root/backups/plane_aws_dump_08-05-2024_06_48_21.sql
 
 Delete and Create Database
+
     docker compose exec plane-db bash
     dropdb plane -U plane
     createdb plane -U plane