ACP2E-479 updated translation Csv for newly added confirm modal

Author: mahesh-singh-rajawat

app/code/Magento/Checkout/i18n/en_US.csv

@@ -186,3 +186,7 @@ Payment,Payment
 "Show Cross-sell Items in the Shopping Cart","Show Cross-sell Items in the Shopping Cart"
 "You added %1 to your <a href=""%2"">shopping cart</a>.","You added %1 to your <a href=""%2"">shopping cart</a>."
 "The shipping method is missing. Select the shipping method and try again.","The shipping method is missing. Select the shipping method and try again."
+Are you sure you want to leave the page?,Are you sure you want to leave the page?
+Changes you made to the cart will not be saved.,Changes you made to the cart will not be saved.
+Leave,Leave
+Cancel,Cancel