add announcement

templates/macros/table/config/announcement.jinja

 {%- import "macros/svgs.jinja" as svg -%}
 
-{%- set show_announcement = false %}
+{%- set show_announcement = true %}
 {%- macro announcement() %}
 <div class="alert bg-info alert-dismissible fade show" style="color: #023d6b;" role="alert">
   <h4 class="alert-heading">       
     {{ svg.announcement_svg | safe }}
-    <span class="align-middle">This is the announcement title</span>
+    <span class="align-middle">Frontend Update is now live on staging!</span>
   </h4>
-  This is my announcement text.
+  Hey my fellow Outpost administrators. I've updated the frontend a little bit. The "user_options" you receive during the starting phase has changed. Please update your Outpost config.
+  You find an example configuration <a href="https://gitlab.jsc.fz-juelich.de/kaas/jupyter/-/blob/jupyter-stag-other/outposts/kube/values/base/config.yaml#L793">here</a>.
+  To see what the central hub sends to your Outpost in spawner.user_options, open the console in your browser (press F12) and click on Start.
+  Further questions? Feel free to contact you know who!
   <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
 </div>
 {%- endmacro %}