fix: fix typo safe_etc_dirs

Signed-off-by: Trần Đức Phú <[email protected]>

Author: Phu96

rules/falco-sandbox_rules.yaml

@@ -686,7 +686,7 @@
   tags: [maturity_sandbox, host, container, filesystem, mitre_persistence, T1543]
 
 - list: safe_etc_dirs
-  items: [/etc/cassandra, /etc/ssl/certs/java, /etc/logstash, /etc/nginx/conf.d, /etc/container_environment, /etc/hrmconfig, /etc/fluent/configs.d. /etc/alertmanager]
+  items: [/etc/cassandra, /etc/ssl/certs/java, /etc/logstash, /etc/nginx/conf.d, /etc/container_environment, /etc/hrmconfig, /etc/fluent/configs.d, /etc/alertmanager]
 
 - macro: fluentd_writing_conf_files
   condition: (proc.name=start-fluentd and fd.name in (/etc/fluent/fluent.conf, /etc/td-agent/td-agent.conf))