Apostrocide. (#1701)

(cherry picked from commit 937a716d1af205f5e9b6f512c88012d7ad3e3f02)

Author: ZevEisenberg

Sources/ComposableArchitecture/TestStore.swift

@@ -559,7 +559,7 @@ public final class TestStore<State, Action, ScopedState, ScopedAction, Environme
   private let store: Store<State, TestReducer<State, Action>.TestAction>
   private let toScopedState: (State) -> ScopedState
 
-  /// Creates a test store with an initial state and a reducer powering it's runtime.
+  /// Creates a test store with an initial state and a reducer powering its runtime.
   ///
   /// See <doc:Testing> and the documentation of ``TestStore`` for more information on how to best
   /// use a test store.