chore: fix migration README

migrations/README.md

@@ -3,6 +3,9 @@
 1. Create a new file based on the current date and time (see existing migration format)
 2. Copy the following code and update MY_ID_HERE and MY_COMMENT_HERE and DO_SOMETHING_HERE
 3. Add the ID to the list of migrations in migrate.go
+4. If possible, add a rollback function.
+
+*For Postgres/Sqlite specific migrations, see the [initial migration](202402161653.go)*
 
 ```go
 package migrations