Update ZK working group with latest recording and some links.

wgs/zk/README.md

@@ -8,3 +8,11 @@
 | 2 | Feb 7, 2024 | [Agenda Link](https://docs.google.com/presentation/d/1jTf28upZBGwrrD8DiFVWTZZtNj_5XvNHhAtqIJuQWtY/edit?usp=drive_link) | Notes Link | [Recording Link](https://drive.google.com/file/d/1v9iB_mNRp9_oIZWMX6PFO652y0jnBvHD/view?usp=drive_link) |
 | 3 | Feb 21, 2024 | Agenda Link | Notes Link | [Recording Link](https://drive.google.com/file/d/1tjjbiXfgbbWcRHuo1RH51OvmLKIJPIhQ/view?usp=drive_link) |
 | 4 | March 6, 2024 | Agenda Link | Notes Link | [Recording Link](https://drive.google.com/file/d/1iTa6U6BSsLMcaHJ4rB-KlLPOJInlJ7r2/view?usp=drive_link) |
+| 4 | March 21, 2024 | Agenda Link | Notes Link | [Recording Link](https://drive.google.com/file/d/1vKg8qA6tSAXPopt6G0Bsgf9jdAAjeN3u/view?usp=drive_link) |
+
+
+
+## Resources 
+
+[Shumo/Nebra's notes on GNARK](https://hackmd.io/@nebra-one/Bk2E3JfJA)
+[Uma/Succinct's post on Snark accounts](https://forum.celestia.org/t/celestia-snark-accounts-design-spec/1639)