Added badges

Author: santiago-bassett

README.md

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 # Wazuh Ruleset
 
+[![Slack](https://img.shields.io/badge/slack-join-blue.svg)](https://goo.gl/forms/M2AoZC4b2R9A9Zy12)
+[![Email](https://img.shields.io/badge/email-join-blue.svg)](https://groups.google.com/forum/#!forum/wazuh)
+[![Documentation](https://img.shields.io/badge/docs-view-green.svg)](https://documentation.wazuh.com)
+[![Documentation](https://img.shields.io/badge/web-view-green.svg)](https://wazuh.com)
+
 Wazuh ruleset is used to detect attacks, intrusions, software misuse, configuration problems, application errors, malware, rootkits, system anomalies or security policy violations.
 
 The ruleset includes compliance mapping with PCI DSS v3.1 and CIS.