Cosmetic changes for alerts

Change-Id: I383a0be89138be10b24fe7b651eac903ecda8397
Closes-bug: PROD-20466
diff --git a/ntp/meta/prometheus.yml b/ntp/meta/prometheus.yml
index 5c632cf..b4172e1 100644
--- a/ntp/meta/prometheus.yml
+++ b/ntp/meta/prometheus.yml
@@ -13,6 +13,6 @@
         service: ntp
       annotations:
         summary: "NTP offset reached the limit of {{ threshold }}ms{%- raw %}"
-        description: "The NTP offset on the {{ $labels.host }} node is {{ $value }}ms for at least 2 minutes."
+        description: "The NTP offset on the {{ $labels.host }} node is {{ $value }}ms for 2 minutes."
 {%- endraw %}
 {%- endif %}