Fix typo in UncheckedSendable doc comment (#1254)

(cherry picked from commit a572f531747d4bec1769d81e76e605300466941b)

# Conflicts:
#	Sources/ComposableArchitecture/Effects/ConcurrencySupport.swift

Author: ole

Sources/ComposableArchitecture/Effects/ConcurrencySupport.swift

@@ -332,7 +332,7 @@
   ///
   /// Sometimes we need to use types that should be sendable but have not yet been audited for
   /// sendability. If we feel confident that the type is truly sendable, and we don't want to blanket
-  /// disable concurrency warnings for a module via `@precondition import`, then we can selectively
+  /// disable concurrency warnings for a module via `@preconcurrency import`, then we can selectively
   /// make that single type sendable by wrapping it in ``UncheckedSendable``.
   ///
   /// > Note: By wrapping something in ``UncheckedSendable`` you are asking the compiler to trust