add ep15 link for netstack.FM to 2025-11-26 (cloudflare::pingora)

episode 15 — Pingora with Edward and Noah from Cloudflare

Author: GlenDC

draft/2025-11-26-this-week-in-rust.md

@@ -47,6 +47,8 @@ and just ask the editors to select the category.
 
 ### Observations/Thoughts
 
+* [audio] [Netstack.FM episode 15 — Pingora with Edward and Noah from Cloudflare](https://netstack.fm/#episode-15)
+
 ### Rust Walkthroughs
 
 ### Research