Add resource for SQL Injection (#6637)

* Update sql-injection@P-Am25WJV8cFd_KsX7cdj.md

* Update src/data/roadmaps/cyber-security/content/sql-injection@P-Am25WJV8cFd_KsX7cdj.md

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

src/data/roadmaps/cyber-security/content/sql-injection@P-Am25WJV8cFd_KsX7cdj.md

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+# What is SQL Injection?
+
+**SQL Injection** is a type of web application security vulnerability that allows an attacker to inject malicious SQL code into a web application's database, potentially leading to unauthorized data access, modification, or deletion.
+
+Visit the following resources to learn more:
+
+- [@article@PortSwigger - SQL Injection](https://portswigger.net/web-security/sql-injection)