Move "services down" to a macro for possible re-use elsewhere

Also improved the wording

templates/speech/basement_briefing.yaml

@@ -6,6 +6,7 @@
   {% from 'speech.jinja' import greeting, today_is, sun_status %}
   {% from 'weather.jinja' import weatherReport %}
   {% from 'sports.jinja' import sports_updates %}
+  {% from 'server.jinja' import services_down %}
     <p>
       {{ greeting('date') }}
     </p>
@@ -22,10 +23,7 @@
     </p>
 
     <p>
-      There are {{ states('sensor.services_down') }} services currently offline.
-      {% if states('sensor.services_down') | int > 0 %}
-        They are {{ state_attr('sensor.services_down','services') }}.
-      {% endif %}
+      {{ services_down() }}
     </p>
 
     <p>