fix stepKey name

Author: engcom-Charlie

app/code/Magento/Catalog/Test/Mftf/Test/AdminApplyTierPriceToProductTest/AdminApplyTierPriceToProductWithPercentageDiscountTest.xml

@@ -44,7 +44,7 @@
         <comment userInput="Comment is added to preserve the step key for backward compatibility" stepKey="scrollToTopOfPage"/>
         <actionGroup ref="AdminProductFormOpenAdvancedPricingDialogActionGroup" stepKey="clickOnAdvancedPricingButton"/>
         <comment userInput="Comment is added to preserve the step key for backward compatibility" stepKey="waitForCustomerGroupPriceAddButton"/>
-        <comment userInput="Comment is added to preserve the step key for backward compatibility" stepKey="addCustomerGroupAllGroupsQty1PriceDiscountAndpercente"/>
+        <comment userInput="Comment is added to preserve the step key for backward compatibility" stepKey="addCustomerGroupAllGroupsQty1PriceDiscountAndpercent"/>
         <comment userInput="Comment is added to preserve the step key for backward compatibility" stepKey="fillProductTierPriceQtyInput"/>
         <comment userInput="Comment is added to preserve the step key for backward compatibility" stepKey="selectProductTierPriceValueType"/>