gh-99026 update dataclasses docs for when annotations are inspected (gh-100798)


update dataclasses docs for when annotations are inspected
(cherry picked from commit 659c2607f5b44a8a18a0840d1ac39df8a3219dd5)

Co-authored-by: Akshit Tyagi <37214399+exitflynn@users.noreply.github.com>