add minor fix

Author: Usik2203

app/code/Magento/Catalog/Test/Mftf/Section/StorefrontProductPageSection.xml

@@ -25,6 +25,6 @@
         <element name="customOptionDropDown" type="select" selector="//*[@id='product-options-wrapper']//select[contains(@class, 'product-custom-option admin__control-select')]"/>
         <element name="qtyInputWithProduct" type="input" selector="//tr//strong[contains(.,'{{productName}}')]/../../td[@class='col qty']//input" parameterized="true"/>
         <element name="customOptionRadio" type="input" selector="//span[contains(text(),'{{customOption}}')]/../../input" parameterized="true"/>
-        <element name="onlyProductsLeft" type="block" selector="//div[@class='availability only']"/>
+        <element name="onlyProductsLeft" type="block" selector="//div[@class='product-info-price']//div[@class='product-info-stock-sku']//div[@class='availability only']"/>
     </section>
 </sections>

app/code/Magento/Catalog/Test/Mftf/Test/StorefrontOnlyXProductLeftForSimpleProductsTest.xml

@@ -22,7 +22,7 @@
                 <requiredEntity createDataKey="createCategory"/>
             </createData>
             <magentoCLI command="config:set {{CatalogInventoryOptionsOnlyXleftThreshold.path}} 10000" stepKey="setStockThresholdQty"/>
-            <magentoCLI command="cache:flush" stepKey="flushCache"/>
+            <magentoCLI command="cache:flush config" stepKey="flushCache"/>
         </before>
         <after>
             <deleteData createDataKey="createCategory" stepKey="deleteCategory"/>