dillon1000/react

Minor update to portals docs "child" language (#10870)

* Update portals docs "child" language

This commit changes the portals docs so that the language of the Parent
no longer feels like it is missing a word with "is not a child the div
with onClick handler" and replaces that with "is not a direct child of
the div with the onClick handler".

closes #10868

* Update portals.md