Updates from editor

Author: manjusha729

app/code/Magento/PageBuilder/Test/Mftf/Section/PageBuilderWYSIWYGSection/WYSIWYGOnPageBuilderSection.xml

@@ -10,7 +10,7 @@
     <section name="WYSIWYGOnPageBuilder">
         <element name="undo" type="button" selector=".tox-tinymce:not(.tox-tinymce-inline) button[aria-label='Undo']"/>
         <element name="redo" type="button" selector=".tox-tinymce:not(.tox-tinymce-inline) button[aria-label='Redo']"/>
-        <element name="fontSize" type="button" selector=".tox-tinymce:not(.tox-tinymce-inline) button[aria-label='Font sizes']"/>
+        <element name="fontSize" type="button" selector=".tox-tinymce:not(.tox-tinymce-inline) button[aria-label*='font size']:nth-of-type(1)"/>
         <element name="lineHeight" type="button" selector=".mce-tinymce:not(.mce-tinymce-inline) div[aria-label='Line Height']"/>
         <element name="textColor" type="button" selector=".tox-tinymce:not(.tox-tinymce-inline) div[aria-label='Text color Black']"/>
         <element name="backgroundColor" type="button" selector=".tox-tinymce:not(.tox-tinymce-inline) div[aria-label='Background color Black']"/>