MAGETWO-31962: Link for 'Guide to Using Sample Data' does not work during instalation

- added link to sample data documentation

Author: mazhalai

setup/module/Magento/Setup/view/magento/setup/customize-your-store.phtml

@@ -16,7 +16,7 @@
     <div class="form-group">
         <label class="col-md-3 control-label">Sample Data</label>
         <div class="col-md-6">
-            <p class="form-control-static text-muted">Using sample of "fake" data can be helpful, letting you automatically build your store with fictious products, tax, and payment settings. But it also creates a lot of extra data you need to remove later. Learn the pros and cons in out <a href="">Guide to Using Sample Data</a>.</p>
+            <p class="form-control-static text-muted">Using sample of "fake" data can be helpful, letting you automatically build your store with fictitious products, tax, and payment settings. But it also creates a lot of extra data you need to remove later. Learn the pros and cons in out <a target="_blank" href="http://devdocs.magento.com/guides/v1.0/install-gde/install/sample-data.html">Guide to Using Sample Data</a>.</p>
         </div>
     </div>