Add L2BEAT Podcast Talk (#2743)

* Update talks.md

* Update apps/docs/docs/references/talks.md

* prettier

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Co-authored-by: Raymond Cheng <me@raymondcheng.net>

apps/docs/docs/references/talks.md

@@ -3,6 +3,14 @@ title: Talks
 sidebar_position: 6
 ---
 
+<iframe width="560" height="315" src="https://www.youtube.com/embed/Ji5v3_urn0Y?si=ITHM7YnOuZzYQxU4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
+**Open Source Observer - KYB \#5**  
+Raymond Cheng & Carl Cervone. [watch](https://www.youtube.com/watch?v=Ji5v3_urn0Y)🎥  
+L2BEAT Podcast. January 2025.
+
+---
+
 <iframe width="560" height="315" src="https://www.youtube.com/embed/ZNBQ68f5xC0?si=OfFHv9sr-0-9ts7d" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
 
 **Incentive Mechanism Design for Public Goods Funding | Kariba Labs**