Trigger Flow on document approval.

I have a flow that creates a PDF version of a document. I had it set to triggered manually and it works great.

I now want to trigger automatically when the word document is approved. I changed the trigger to

when file modified->getChangesForandItem->condition.
Now on the condition not sure what to put. I tried using {ApprovalStatus}/Value = Approved but that did not work. Need i to trigger when the status

Or maybe there is an easier way to do this?

Thanks,

Chris