[ACQE-7786] added comment for adding pr_exclude

Author: chandrakalahanchinal

InventoryAdminUi/Test/Mftf/Test/ConfigurableProductWithDropDownAttributeOnTestStockGetOutOfStockWhenAllItsChildProductsGetOutOfStockOrDisabledTest.xml

@@ -17,6 +17,7 @@
             <severity value="CRITICAL"/>
             <group value="msi"/>
             <group value="multi_mode"/>
+            <!-- pr_exclude group is added as test is failed in builds because of xpath element not found error and will be fixed and removed in ACQE-7619 -->
             <group value="pr_exclude"/>
         </annotations>