MAGETWO-92562: drop handle appears randomly if the column is tall

- Resolve step key issue

Author: davemacaulay

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

@@ -496,7 +496,7 @@
             <argument name="contentType" value="PageBuilderHeadingContentType"/>
         </actionGroup>
         <comment userInput="Attempt to move heading into half way down other group" stepKey="commentMoveHeading"/>
-        <actionGroup ref="moveContentTypeToContainer" stepKey="moveSliderIntoExistingRow">
+        <actionGroup ref="moveContentTypeToContainer" stepKey="moveHeadingIntoExistingColumn">
             <argument name="contentType" value="PageBuilderHeadingContentType"/>
             <argument name="contentTypeIndex" value="5"/>
             <argument name="containerTargetType" value="PageBuilderColumnContentType"/>