change message and change spec

app/assets/javascripts/sidebar/components/confidential/confidential_issue_sidebar.vue

@@ -71,7 +71,7 @@ export default {
       />
       <div v-if="!isConfidential" class="no-value confidential-value">
         <i class="fa fa-eye is-not-confidential"></i>
-        None
+        This issue is not confidential
       </div>
       <div v-else class="value confidential-value hide-collapsed">
         <i aria-hidden="true" data-hidden="true" class="fa fa-eye-slash is-confidential"></i>

spec/javascripts/sidebar/confidential_issue_sidebar_spec.js

@@ -41,7 +41,7 @@ describe('Confidential Issue Sidebar Block', () => {
     ).toBe(true);
 
     expect(
-      vm2.$el.innerHTML.includes('None'),
+      vm2.$el.innerHTML.includes('This issue is not confidential'),
     ).toBe(true);
   });