PB-500 correct capitalization

Author: paras89

app/code/Magento/PageBuilder/Test/Mftf/ActionGroup/ContentTypeColumnGroupActionGroup/UpdateGridSizeInvalidInFormActionGroup.xml

@@ -7,7 +7,7 @@
 -->
 <actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
-    <actionGroup name="UpdateGridSizeInvalidInForm">
+    <actionGroup name="updateGridSizeInvalidInForm">
         <arguments>
             <argument name="gridSize" defaultValue="12" type="string"/>
             <argument name="errorMessage"/>