fix: QR Code multi currency issue

When try to scan qr code on app it is showing correct values for multi currencies because it is not getting base amount

(cherry picked from commit b10a2b8)

erpnext/regional/saudi_arabia/utils.py

@@ -84,7 +84,7 @@ def create_qr_code(doc, method=None):
 		tlv_array.append("".join([tag, length, value]))
 
 		# Invoice Amount
-		invoice_amount = str(doc.grand_total)
+		invoice_amount = str(doc.base_grand_total)
 		tag = bytes([4]).hex()
 		length = bytes([len(invoice_amount)]).hex()
 		value = invoice_amount.encode("utf-8").hex()
@@ -144,7 +144,7 @@ def get_vat_amount(doc):
 
 	for tax in doc.get("taxes"):
 		if tax.account_head in vat_accounts:
-			vat_amount += tax.tax_amount
+			vat_amount += tax.base_tax_amount
 
 	return vat_amount