Merge pull request juice-shop#2076 from Josh-Beck/patch-1

Add Juice Shop talk NCS 2023

REFERENCES.md

@@ -304,6 +304,7 @@ mentioned or used!
 
 #### 2023
 
+* :date: [How Vulnerable is Juice Shop? A Secure Code Review of Insecure Code](https://www.nationalcybersummit.com/Program/2023-Agenda) by Joshua Beck, [National Cyber Summit 2023](https://www.nationalcybersummit.com/Home). 20.09.2023 
 * :date: [Track keynote: OWASP Juice Shop](https://sikkerhetsfestivalen.no/program-2023) by Björn Kimminich, [Sikkerhetsfestivalen 2023](https://sikkerhetsfestivalen.no/). 29.08.2023
 * :date: [Juice Shop Update³](https://god.owasp.de/2023/schedule/index.html) by Björn Kimminich, [German OWASP Day 2023](https://god.owasp.de/2023). 31.05.2023
 * :date: [Juice Shop Training: Train the Trainer Edition](https://god.owasp.de/2023/schedule/index.html) with Björn Kimminich, [German OWASP Day 2023](https://god.owasp.de/2023). 30.05.2023