It's useful to note that even if Kotek doesn't sign the bill, because it's already passed through the legislature, it will become law unless she actively vetoes it.
In Oregon, bills become effective as soon as the governor signs them, or, if the governor doesn't sign them, 30 days after the legislature approves the bill.
It also passed both chambers with a surprising majority (47 - 10 in the House, 16 - 9 in the Senate). I have a very hard time believing that should Kotek veto it, one person wouldn't swing to "Yes" in the senate, hitting that 2/3rds majority to override.