Link review thread for SE-0475 (#2786)

Author: Jumhyn

proposals/0475-observed.md

@@ -5,7 +5,7 @@
 * Review Manager: [Freddy Kellison-Linn](https://github.com/Jumhyn)
 * Status: **Active Review (Apr 10...24)**
 * Implementation: https://github.com/swiftlang/swift/pull/79817
-* Review: ([pitch](https://forums.swift.org/t/pitch-transactional-observation-of-values/78315))
+* Review: ([pitch](https://forums.swift.org/t/pitch-transactional-observation-of-values/78315)) ([review](https://forums.swift.org/t/se-0475-transactional-observation-of-values/79224))
 
 ## Introduction