Fix wording of #5858 issue.review.reject string (#5869)

As per @lafriks comment this should be: requested changes

Signed-off-by: Andrew Thornton <art27@cantab.net>

options/locale/locale_en-US.ini

@@ -842,7 +842,7 @@ issues.review.self.rejection = You cannot request changes on your own pull reque
 issues.review.approve = "approved these changes %s"
 issues.review.comment = "reviewed %s"
 issues.review.content.empty = You need to leave a comment indicating the requested change(s).
-issues.review.reject = "requested these changes %s"
+issues.review.reject = "requested changes %s"
 issues.review.pending = Pending
 issues.review.review = Review
 issues.review.reviewers = Reviewers