[docs] Semaphore (#5524)
[docs] Semaphore (#5524)

* Updating and adding headings.

* Update website/source/docs/guides/semaphore.html.md

Co-Authored-By: kaitlincarter-hc <6631e805d4c3a94812ed3013eca7b240a6190940@users.noreply.github.com>

* Update website/source/docs/guides/semaphore.html.md

Co-Authored-By: kaitlincarter-hc <6631e805d4c3a94812ed3013eca7b240a6190940@users.noreply.github.com>

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