MC-2259: Build Stabilization

Fix spelling of "pagebuilder"

Author: danmooney2

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

@@ -325,7 +325,7 @@
             <severity value="CRITICAL"/>
             <useCaseId value="MAGETWO-83415"/>
             <testCaseId value="MAGETWO-89467"/>
-            <group value="pagebuiler"/>
+            <group value="pagebuilder"/>
             <group value="pagebuilder-block"/>
             <group value="pagebuilder-customBeforeAfter"/>
         </annotations>