Add missing newline at end of discord alert config file

Author: jb3

kubernetes/namespaces/monitoring/alerts/alerts.d/discord.yaml

@@ -23,4 +23,4 @@ groups:
       severity: page
     annotations:
       summary: "Experimental: Unusual growth in guild members"
-      description: "Guild member count has increased by more than 20% compared to the previous 30-minute period, which may indicate a raid or other unusual activity."
+      description: "Guild member count has increased by more than 20% compared to the previous 30-minute period, which may indicate a raid or other unusual activity."