Add transcript for TMiR 2025-08 (#349)

* Add transcript for TMiR 2025-08

* Fix titles

Author: vcarl

src/transcripts/tmir-2025-06.md

@@ -1,5 +1,5 @@
 ---
-title: "TMiR 2025-06: Vercel shakeups, new React Compiler docs"
+title: "TMiR 2025-06: kinda quiet tbh. ES2025 finalized, new Safari"
 date: 2025-06-30
 time: 10am PT / 5PM GMT
 location: Main Stage on Reactiflux