[FIX] l10n_ae_pos: avoid string-based xpath

Being text-based is a bad idea. Better have clear nodes to fetch in original
XML.

closes odoo/odoo#104686

Signed-off-by: Masereel Pierre <pim@odoo.com>

addons/l10n_ae_pos/static/src/xml/Screens/ReceiptScreen/OrderReceipt.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <templates id="template" xml:space="preserve">
     <t t-name="OrderReceiptVAT" t-inherit="point_of_sale.OrderReceipt" t-inherit-mode="extension" owl="1">
-        <xpath expr="//div[contains(text(), 'Total Taxes')]" position="replace">
-            <div>
+        <xpath expr="//div[@id='post_receipt_taxes_container']" position="replace">
+            <div id='post_receipt_taxes_container'>
                 <t t-if="env.pos.company.country.code == 'AE'">VAT</t>
                 <t t-else="">Total Taxes</t>
                 <span t-esc="env.pos.format_currency(receipt.total_tax)" class="pos-receipt-right-align"/>

addons/point_of_sale/static/src/xml/Screens/ReceiptScreen/OrderReceipt.xml

@@ -114,7 +114,7 @@
                         <span t-esc="env.pos.format_currency_no_symbol(tax.amount)" class="pos-receipt-right-align"/>
                     </div>
                 </t>
-                <div>
+                <div id="post_receipt_taxes_container">
                     Total Taxes
                     <span t-esc="env.pos.format_currency(receipt.total_tax)" class="pos-receipt-right-align"/>
                 </div>