Fix "ready for review" link

Remove assignee_id=0 condition from search filters, we agreed
that just presence of "ready of review" label is sufficient
for filtering MRs, no need to unassign yourself.

doc/development/code_review.md

@@ -109,7 +109,7 @@ It is responsibility of the author of a merge request that the merge request is
 
 ### List of merge requests ready for review
 
-Developers who have capacity can regularly check the list of [merge requests to review](https://gitlab.com/groups/gitlab-org/-/merge_requests?scope=all&utf8=%E2%9C%93&state=opened&label_name%5B%5D=ready%20for%20review&assignee_id=0) and assign any merge request they want to review.
+Developers who have capacity can regularly check the list of [merge requests to review](https://gitlab.com/groups/gitlab-org/-/merge_requests?scope=all&utf8=%E2%9C%93&state=opened&label_name%5B%5D=ready%20for%20review) and assign any merge request they want to review.
 
 ### Reviewing code