Update doc/contribute/contributor_expectations.rst

Co-authored-by: Benjamin Cabé <[email protected]>

doc/contribute/contributor_expectations.rst

@@ -317,7 +317,7 @@ Reviewer Expectations
   notably those specific to the changes being submitted (e.g. the use of a
   particular data structure or the choice of locking primitives).
 
-- Reviewers shall be *clear* and *concise* what changes they are requesting when the
+ - Reviewers shall be *clear* about what changes they are requesting when the
   "Request Changes" option is used. Requested changes shall be in the scope of
   the PR in question and following the contribution and style guidelines of the
   project. Furthermore, reviewers must be able to point back to the exact issues