fix 404 when clicking on old version warning button

app/components/guides-article.js

@@ -89,5 +89,10 @@ export default Component.extend({
       codeBlock.innerHTML = lines.join('\n');
     })
 
+  },
+  actions: {
+    selectVersion (currentVersion) {
+      this.selectVersion(currentVersion);
+    }
   }
 });

app/templates/components/guides-article.hbs

@@ -1,8 +1,7 @@
 {{#unless (eq version currentVersion)}}
  <div class="old-version-warning">
    <i class="icon-attention-circled"></i><strong>Old Guides - </strong>You are viewing the guides for Ember {{version}}.
-
-   {{#link-to 'version.show' 'release' path class="btn"}} VIEW {{currentVersion}} {{/link-to}}
+    <button onclick={{action "selectVersion" currentVersion}} class="btn">VIEW {{currentVersion}} </button>
  </div>
 {{/unless}}
 

app/templates/version/index.hbs

@@ -1 +1 @@
-{{guides-article model=model.content pages=model.pages path='index' version=model.version currentVersion=model.currentVersion}}
+{{guides-article model=model.content pages=model.pages path='index' version=model.version currentVersion=model.currentVersion selectVersion=(action 'selectVersion')}}

app/templates/version/show.hbs

@@ -1 +1 @@
-{{guides-article model=model.content pages=model.pages path=model.path version=model.version currentVersion=model.currentVersion}}
+{{guides-article model=model.content pages=model.pages path=model.path version=model.version currentVersion=model.currentVersion selectVersion=(action 'selectVersion')}}