fixup! fixup! [llvm][docs] Add notes on upstreaming code from downstream projects

Include suggestion from Hubert

Author: banach-space

llvm/docs/CodeReview.rst

@@ -286,5 +286,5 @@ When upstreaming changes originally written by someone else:
 * Properly attribute the original changes, e.g., by creating a commit with
   multiple authors ([GitHub guide](https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/creating-a-commit-with-multiple-authors)).  
 * Invite the original author(s) to review the changes, and also include
-  additional reviewers. Specifically, an LGTM from a (co-)author does not
-  constitute approval to land a change.
+  additional reviewers. Specifically, an LGTM from a (co-)author should not be
+  taken as approval to land a change.