chore: update talks.yml

Author: billwang485

_data/talks.yml

@@ -1,13 +1,13 @@
 - type: "Upcoming Talks"
   members:
     - speaker: "Nathaniel Pinckney (NVIDIA)"
-      date: "August 20, 2025, 12:00 PM EST"
-      title: "TBD"
+      date: "September 10, 2025, 12:00 PM EST"
+      title: "Developing High-quality LLMs for Si Design: Next Generation Evaluation Datasets and Metrics"
       abstract: "TBD"
-      bio: "TBD"
+      bio: "Nate Pinckney received his Ph.D. in Electrical Engineering from the University of Michigan in 2015. He is currently a Senior Research Scientist at NVIDIA in Austin, Texas. His work spans high-level synthesis methodologies, low-power VLSI design, and cryptographic accelerators, with over 40 publications in these areas. More recently, his research has focused on evaluating large language models and AI agents, including co-creating the VerilogEval and Comprehensive Verilog Design Problems (CVDP) benchmarks."
       livestream: "#"
     - speaker: "Kexun Zhang (ChipAgents)"
-      date: "August 27, 2025, 12:00 PM EST"
+      date: "TBD"
       title: "TBD"
       abstract: "TBD"
       bio: "TBD"