Add content to cyber security roadmap (#6543)

* add content reconnaissance@UU_inxa8Y2lLP2BRhdLDT.md

* Update src/data/roadmaps/cyber-security/content/reconnaissance@UU_inxa8Y2lLP2BRhdLDT.md

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Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

src/data/roadmaps/cyber-security/content/reconnaissance@UU_inxa8Y2lLP2BRhdLDT.md

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+# Reconnaissance
+
+Reconnaissance is the first phase of a cyberattack, during which attackers gather as much information as possible about a target system, network, or organization. The goal of reconnaissance is to identify potential vulnerabilities, entry points, and other valuable details that can be exploited in subsequent attack phases.
+
+Visit the following resources to learn more:
+
+- [@article@What is Cyber Reconnaissance](https://www.sentinelone.com/cybersecurity-101/threat-intelligence/what-is-cyber-reconnaissance/)