Update using_datasets.md

[coding-hello]

When I run the command '$ floyd run --data GY3QRFFUA8KpbnqvroTPPW "ls -la /input"', floyd will syncing all of data in the current directory. If the directory have 1GB data ？ No need. So my suggestion is to modify the floyd command not uploading data when the command is just shell command. But now, we can make an empty project to avoid it.

[saiprashanths]

Thanks! We will implement more intelligent syncing soon.

But ideally, your code shouldn't be 1GB. If it is, you might want to consider either separating code and data or adding the files/dirs you don't want to sync to .floydignore