fix typo (#3697)

Author: hmhv

README.md

@@ -264,7 +264,7 @@ the store. The code is a bit longer than the SwiftUI version, so we have collaps
         guard let self 
         else { return }
 
-        countLabel.text = "\(self.store.text)"
+        countLabel.text = "\(self.store.count)"
         factLabel.text = self.store.numberFact
       }
     }

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

@@ -205,7 +205,7 @@ class FeatureViewController: UIViewController {
       guard let self 
       else { return }
 
-      countLabel.text = "\(self.store.text)"
+      countLabel.text = "\(self.store.count)"
       factLabel.text = self.store.numberFact
     }
   }

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

@@ -47,7 +47,7 @@ struct CounterView: View {
 This will make sure that the view subscribes to any fields accessed in the `@Perceptible` model so
 that changes to those fields invalidate the view and cause it to re-render.
 
-If a field of a `@Percetible` model is accessed in a view while _not_ inside
+If a field of a `@Perceptible` model is accessed in a view while _not_ inside
 `WithPerceptionTracking`, then a runtime warning will be triggered:
 
 > 🟣 Runtime Warning: Perceptible state was accessed but is not being tracked. Track changes to