Annotate readme code block as being swift

Obbut · Obbut · commit 6435a7e3d62f · 2024-01-25T15:25:51.000+01:00
diff --git a/README.md b/README.md
@@ -8,7 +8,7 @@ Our primary use case for this package is with [The Composable Architecture](http
 
 ## Usage
 
-```
+```swift
 import Sync
 
 struct UserProfile {
