Update "Create an Annotation" documentation #2537
Description
https://flowframework.readthedocs.io/en/stable/TheDefinitiveGuide/PartIII/Reflection.html#create-an-annotation-class needs to be updated to reflect changes in #2468
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https://flowframework.readthedocs.io/en/stable/TheDefinitiveGuide/PartIII/Reflection.html#create-an-annotation-class needs to be updated to reflect changes in #2468