[llvm] [docs] Update docs on code-review process (PR #111735)

[Jakub Kuderski via llvm-commits]

================
@@ -150,14 +150,20 @@ almost always associated with a message containing the text "LGTM" (which
 stands for Looks Good To Me). Only approval from a single reviewer is required.
 
 When providing an unqualified LGTM (approval to commit), it is the
-responsibility of the reviewer to have reviewed all of the discussion and
+responsibility of the reviewer to have reviewed all of the prior discussion and
 feedback from all reviewers ensuring that all feedback has been addressed and
 that all other reviewers will almost surely be satisfied with the patch being
 approved. If unsure, the reviewer should provide a qualified approval, (e.g.,
 "LGTM, but please wait for @someone, @someone_else"). You may also do this if
 you are fairly certain that a particular community member will wish to review,
 even if that person hasn't done so yet.
 
+If additional feedback is provided after acceptance (by the same reviewer or
+another), the author should use their best judgement in deciding whether that
+feedback can be incorporated into the change without comment (say a typo) or
+requires further review discussion. More substantial comments (e.g. about the
----------------
kuhar wrote:

Let's keep this consistent with the style used above
```suggestion
requires further review discussion. More substantial comments (e.g., about the
```

https://github.com/llvm/llvm-project/pull/111735