Update link to the official git website

app/views/admin/application_settings/_repository_check.html.haml

@@ -12,7 +12,7 @@
               Enable Repository Checks
             .help-block
               GitLab will periodically run
-              %a{ href: 'https://www.kernel.org/pub/software/scm/git/docs/git-fsck.html', target: 'blank' } 'git fsck'
+              %a{ href: 'https://git-scm.com/docs/git-fsck', target: 'blank' } 'git fsck'
               in all project and wiki repositories to look for silent disk corruption issues.
       .form-group
         .col-sm-offset-2.col-sm-10