Update docs for Explicit shared state.

Author: connor-ricks

Sources/ComposableArchitecture/Documentation.docc/Articles/SharingState.md

@@ -74,8 +74,8 @@ dependency or using the shared state tools discussed in this article.
 ## Explicit shared state
 
 This is the simplest kind of shared state to get started with. It allows you to share state amongst
-many features without any persistence. The data is only held in memory, and will be cleared out the
-next time the application is run.
+many features without any persistence. The data is only held in memory, and will be cleared out 
+when the shared state is deallocated.
 
 To share data in this style, use the `@Shared` property wrapper with no arguments.
 For example, suppose you have a feature that holds a count and you want to be able to hand a shared
@@ -87,7 +87,7 @@ the feature's state:
 struct ParentFeature {
   @ObservableState
   struct State {
-    @Shared var count: Int
+    @Shared(value: 0) var count: Int
     // Other properties
   }
   // ...