docs: clarify db.from() method chaining order

[MajorTal]

Problem

Not documented whether db.from('t').update({...}).eq('id', 1) and db.from('t').eq('id', 1).update({...}) are equivalent. Had to guess.

Suggested Solution

Add a note to the db.from() docs: "Filter methods (.eq(), .gt(), etc.) and action methods (.select(), .insert(), .update(), .delete()) can be chained in any order."