[llvm] [CoroEarly][IR] Clarify semantic of llvm.coro.end (PR #191752)

[Weibo He via llvm-commits]

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@@ -1493,9 +1493,7 @@ A frontend should emit function attribute `presplitcoroutine` for the coroutine.
 Overview:
 """""""""
 
-The '``llvm.coro.end``' marks the point where execution of the resume part of
-the coroutine should end and control should return to the caller.
-
+The '``llvm.coro.end``' marks the point where access to the coroutine frame ends.
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NewSigma wrote:

Personally, I feel the wording not entirely precise for this pr, but I’m open to it.

https://github.com/llvm/llvm-project/pull/191752