Fix typo in Cisco Secure Firewall transparent firewall dashboard

[trevdem]

Summary

The Cisco Secure Firewall transparent firewall dashboard (cisco_secure_firewall/assets/dashboards/cisco_secure_firewall_transparent_firewall.json) contains a misspelled widget title and matching dashboard content.

Typo

Location	Current text	Suggested fix
Widget title	Number Of Times Failure Occured	Number Of Times Failure Occurred
Dashboard content	Number Of Times Failure Occured	Number Of Times Failure Occurred

Impact

This typo is visible to users in the shipped Cisco Secure Firewall dashboard template.