Update ReadMe of `1-dimensional-data-modeling`

[VinothKanna007]

Tables Not loaded using Docker

1. Copy your .dump file into the container

docker cp .\data.dump my-postgres-container:/tmp/data.dump

2. Run pg_restore inside the container

docker exec -it my-postgres-container pg_restore -U postgres -d postgres /tmp/data.dump

✅ This works perfectly with binary .dump files.

[Rahul]

you don't have to manually copy; code does it for you.