Yes, there's a way to update the submitted W-9 of your contractors. You can have them make the needed changes to their W-9 information. QuickBooks will automatically update their details in your QuickBooks Online account.
For more information, you can direct your contractors to this article: Fill out a W-9.
If their W-9 information doesn't sync, you can resend an invite to them. I know how to achieve this to get you back up.
To resend an invite:
Go to the Payroll menu, andthen choose Contractors.
Select the contractor’s name.
Click Send a reminder or Send email.
Once they receive the invitation, please have them fill out their W-9.