Shorter, simpler telegram message.

templates/integrations/telegram_message.html

@@ -2,5 +2,5 @@
 {% if check.status == "down" %}
 The check "{{ check.name_then_code }}" is <b>DOWN</b>. Last ping was {{ check.last_ping|naturaltime }}.
 {% else %}
-The check "{{ check.name_then_code }}" received a ping and is now <b>UP</b>.
+The check "{{ check.name_then_code }}" is now <b>UP</b>.
 {% endif %}