fix: enable tax withholding checkbox in PI with supplier_tds

(cherry picked from commit b461724416)

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py

@@ -158,6 +158,7 @@ class PurchaseInvoice(BuyingController):
 		if tds_category and not for_validate:
 			self.apply_tds = 1
 			self.tax_withholding_category = tds_category
+			self.set_onload("supplier_tds", tds_category)
 
 		super(PurchaseInvoice, self).set_missing_values(for_validate)