Link merge request doc to README

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

doc/workflow/README.md

@@ -13,4 +13,5 @@
 - [Project users](add-user/add-user.md)
 - [Protected branches](protected_branches.md)
 - [Web Editor](web_editor.md)
+- [Merge Requests](merge_requests.md)
 - ["Work In Progress" Merge Requests](wip_merge_requests.md)

doc/workflow/merge_requests.md

@@ -4,7 +4,6 @@ Merge requests allow you to exchange changes you made to source code
 
 ## Checkout merge requests locally
 
-
 Locate the section for your GitLab remote in the `.git/config` file. It looks like this:
 
 ```