Update signature: Deep Manek

Author: Deep Manek

signatures/dpmanek.md

@@ -3,4 +3,4 @@
 - **GitHub:** @dpmanek
 - **Batch:** 2026
 - **I'm here to:** learn how real projects are reviewed and maintained, and become a regular contributor to one of them
-- **One thing I've built:** https://github.com/dpmanek/POP-Payment-App
+- **One thing I've built:** Multiple projects, one of them is one-call, a swing trading app