Added 2 new cybersecurity tools documentation

[RohanDable]

1. Gophish - Many of the costliest data breaches and ransomware attacks in recent years can be traced back to simple phishing campaigns because many company workers fall for them. One of the best protections is to secretly test your staff to see who is gullible, and for that you can use the free program Gophish.
   Link- https://getgophish.com/documentation/

2. Nikto - Nikto is an ultra-powerful, command-line tool useful for uncovering vulnerabilities in web apps, services and web servers. Originally launched in the early 2000s, Nikto is still widely used by both blue and red teams that want to quickly scan web servers for unpatched software, misconfigurations and other security issues.
   Link - https://www.kali.org/tools/nikto/

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