fix: subtract change_amount from paid_amount field on POS Register (#30937)

Co-authored-by: HarryPaulo <paulo_fabris@hotmail.com>
Co-authored-by: Saqib Ansari <nextchamp.saqib@gmail.com>

erpnext/accounts/report/pos_register/pos_register.py

@@ -62,7 +62,7 @@ def get_pos_entries(filters, group_by_field):
 		"""
 		SELECT
 			p.posting_date, p.name as pos_invoice, p.pos_profile,
-			p.owner, p.base_grand_total as grand_total, p.base_paid_amount as paid_amount,
+			p.owner, p.base_grand_total as grand_total, p.base_paid_amount - p.change_amount  as paid_amount,
 			p.customer, p.is_return {select_mop_field}
 		FROM
 			`tabPOS Invoice` p {from_sales_invoice_payment}