[SE-0328] Update status: "Implemented (Swift 5.6)"

Author: benrimmington

proposals/0328-structural-opaque-result-types.md

@@ -3,10 +3,9 @@
 * Proposal: [SE-0328](0328-structural-opaque-result-types.md)
 * Authors: [Benjamin Driscoll](https://github.com/willtunnels), [Holly Borla](https://github.com/hborla)
 * Review Manager: [Ben Cohen](https://github.com/airspeedswift)
-* Status: **Accepted with modifications (2021-11-30)**
-* Decision Notes: [Rationale](https://forums.swift.org/t/accepted-with-modifications-se-0328-structural-opaque-result-type/53789)
-* Implementation: [apple/swift#38392](https://github.com/apple/swift/pull/38392)
-* Toolchain: Any recent [nightly main snapshot](https://swift.org/download/#snapshots) with the `-Xfrontend -enable-experimental-structural-opaque-types` flags
+* Status: **Implemented (Swift 5.6)**
+* Decision Notes: [Accepted with modifications](https://forums.swift.org/t/accepted-with-modifications-se-0328-structural-opaque-result-type/53789)
+* Implementation: [apple/swift#38392](https://github.com/apple/swift/pull/38392), [apple/swift#40361](https://github.com/apple/swift/pull/40361)
 
 ## Introduction