Add a semicolon to the query (#476)

- Fixes missing semicolon in "Find hosts with firewall disabled" query.

handbook/queries/find-hosts-with-the-firewall-diabled.md

@@ -5,7 +5,7 @@ macOS
 
 ### Query
 ```sql
-SELECT * FROM alf WHERE global_state = 0
+SELECT * FROM alf WHERE global_state = 0;
 ```
 
 ### Purpose
@@ -14,4 +14,4 @@ Detection
 
 ### Remediation
 
-TODO
+TODO