[Rule Tuning] Tag Categorization Updates (#380)

* Add new categorization tags

* Change updated_date to 2020/10/26

Co-authored-by: Ross Wolf <31489089+rw-access@users.noreply.github.com>, @bm11100

rules/ml/ml_linux_anomalous_kernel_module_arguments.toml

@@ -2,7 +2,7 @@
 creation_date = "2020/09/03"
 ecs_version = ["1.6.0"]
 maturity = "production"
-updated_date = "2020/09/03"
+updated_date = "2020/10/26"
 
 [rule]
 anomaly_threshold = 25
@@ -26,7 +26,7 @@ references = ["references"]
 risk_score = 21
 rule_id = "37b0816d-af40-40b4-885f-bb162b3c88a9"
 severity = "low"
-tags = ["Elastic", "Linux", "ML"]
+tags = ["Elastic", "Host", "Linux", "Threat Detection", "ML"]
 type = "machine_learning"
 [[rule.threat]]
 framework = "MITRE ATT&CK"