Updated description for the form

app/views/projects/runners/_form.html.haml

@@ -13,11 +13,11 @@
         = f.check_box :run_untagged
         %span.light Indicates whether this runner can pick jobs without tags
   .form-group
-    = label :locked, 'Exclusive to this project', class: 'control-label'
+    = label :locked, 'Lock to this project', class: 'control-label'
     .col-sm-10
       .checkbox
         = f.check_box :locked
-        %span.light Indicates whether this runner can be enabled for other projects
+        %span.light When a runner is locked, it cannot be enabled for other projects
   .form-group
     = label_tag :token, class: 'control-label' do
       Token