Merge branch 'chujinjin/gitlab-ce-fix_wiki_project_clone_address_error' into 'master'

Fix wiki project clone address error

_Note: Originally opened at !4407 by @chujinjin._

---

fix wiki project clone address error in Wiki Git Access View, show as below:

![image](/uploads/5e3bf6d1418c42862a885319c31bc3cf/image.png)

Fixes #17643.

See merge request !4429

CHANGELOG

@@ -14,6 +14,7 @@ v 8.8.3
   - Pass the "Remember me" value to the 2FA token form. !4369
   - Fix incorrect links on pipeline page when merge request created from fork.  !4376
   - Use downcased path to container repository as this is expected path by Docker. !4420
+  - Fix wiki project clone address error (chujinjin). !4429
 
 v 8.8.2
   - Added remove due date button. !4209

app/helpers/button_helper.rb

@@ -30,7 +30,7 @@ module ButtonHelper
 
     content_tag :a, protocol,
       class: klass,
-      href: @project.http_url_to_repo,
+      href: project.http_url_to_repo,
       data: {
         html: true,
         placement: 'right',