Update security template

Author: crivetimihai

SECURITY.md

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+# 🔐 Security Policy
+
+## 📦 Supported Versions
+
+We currently support only the latest version of this project. Older versions are not maintained or patched.
+
+## 🛡️ Reporting a Vulnerability
+
+If you discover a security vulnerability, please report it privately using [GitHub's built-in reporting feature](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing-information-about-vulnerabilities/privately-reporting-a-security-vulnerability):
+
+1. Navigate to Security. If you cannot see the "Security" tab, select the dropdown menu, and then click Security.
+2. Click on **"Report a vulnerability"**.
+3. Fill out the form with details about the vulnerability.
+
+This process ensures that your report is handled confidentially and reaches the maintainers directly.
+
+Thank you for helping to keep the project secure!