Update CHANGELOG with CVEs

Author: hermanzdosilovic

CHANGELOG.md

@@ -3,6 +3,12 @@ This is the Changelog for Judge0 CE. The Changelog for Judge0 Extra CE can be fo
 # v1.13.1 (2024-04-18)
 Security researcher [Daniel Cooper](https://www.linkedin.com/in/daniel-cooper4) (@stacksparrow4) found three critical vulnerabilities in Judge0 versions `<= 1.13.0`, which this release fixes. Thank you, Daniel, for your contribution.
 
+## Security Fixes
+This release fixes the following security vulnerabilities:
+- [CVE-2024-28185](https://github.com/judge0/judge0/security/advisories/GHSA-h9g2-45c8-89cf)
+- [CVE-2024-28189](https://github.com/judge0/judge0/security/advisories/GHSA-3xpw-36v7-2cmg)
+- [CVE-2024-29021](https://github.com/judge0/judge0/security/advisories/GHSA-q7vg-26pg-v5hr)
+
 ## Deployment Procedure
 Judge0 is collecting telemetry data to help improve the product and understand its use in various production environments. Read more about telemetry [here](https://github.com/judge0/judge0/blob/v1.13.1/TELEMETRY.md).