Update builder.html

builder.html

@@ -28,7 +28,7 @@
           This is a demo content from index.html. For the development, you shouldn't edit this file, instead you can
           copy and rename it to _index.html, on next server start the new file will be served, and it will be ignored by git.
         </div>
-        <button class="add-button">Ещё добавь</button>
+        <button class="add-button">Зарегистрироваться</button>
       </div>
       <style>
         .panel {