MC-4234: Missing validation message for 'Number of Products to Display' on Product Content Type

- Fixed minor typos in product test

Author: Hwashiang Yu

app/code/Magento/PageBuilder/Test/Mftf/Test/AdminPageBuilderProductsTest.xml

@@ -140,7 +140,6 @@
             <testCaseId value="MC-4028"/>
             <group value="pagebuilder"/>
             <group value="pagebuilder-products"/>
-            <group value="m"/>
         </annotations>
         <before>
             <actionGroup ref="LoginAsAdmin" stepKey="loginAsAdmin"/>