[IMP] Payroll: Adding 8 new states to US Payroll user doc

Adding 8 new states to the US Payroll user documentation. We are expanding the scope for US Payroll and will be working on additional states, and the documentation needs to be updated as we merge new states.

closes #15674

Signed-off-by: Felicia Kuan (feku) <feku@odoo.com>

Author: hun-odoo

content/applications/hr/payroll/payroll_localizations/united_states.rst

@@ -15,6 +15,14 @@ The states included in this localization are:
 - Alabama (AL)
 - Washington (WA)
 - Nevada (NV)
+- Vermont (VT)
+- Illinois (IL)
+- Virginia (VA)
+- Washington, D.C (DC)
+- Arizona (AZ)
+- Idaho (ID)
+- Oregon (OR)
+- North Carolina (NC)
 
 .. note::
    Federal taxes (Income, :abbr:`FICA (Federal Insurance Contributions Act)`, and Unemployment) for