Change dataset description: Decimal(s) -> Float(s)

[kapkic]

Our existing dataset config has integers and decimals as types.
However, it would make more sense to have them in a consistent fashion:
Integers-floats
numbers-decimals...

We should change decimals to floats to ensure consistency.

[AbhinavGor]

@prat-man what is the status on this? Are we planning on making this change?