MC-3799: Slide poster overlay does not cover entire slide in admin when switching appearances

- Update test case ID

Author: davemacaulay

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

@@ -1278,7 +1278,7 @@
             <description value="Validate that paddings are correctly applied to the slide within the admin when switching between appearances."/>
             <severity value="MAJOR"/>
             <useCaseId value="MC-3799"/>
-            <testCaseId value=""/>
+            <testCaseId value="MC-5179"/>
             <group value="pagebuilder"/>
             <group value="pagebuilder-slider"/>
             <group value="pagebuilder-sliderPoster"/>