Update auth_rare_hour_for_a_user.json

removed a wayward newline char

x-pack/plugins/ml/server/models/data_recognizer/modules/security_auth/ml/auth_rare_hour_for_a_user.json

@@ -1,6 +1,6 @@
 {
   "job_type": "anomaly_detector",
-  "description": "Security: Authentication - looks for a user logging in at a time of day that is unusual for the user. This can be due to credentialed access via a compromised account when the user and the threat actor are in different time zones. \n  In addition, unauthorized user activity often takes place during non-business hours.",
+  "description": "Security: Authentication - looks for a user logging in at a time of day that is unusual for the user. This can be due to credentialed access via a compromised account when the user and the threat actor are in different time zones. In addition, unauthorized user activity often takes place during non-business hours.",
   "groups": [
     "security",
     "authentication"