Update docs/en/SimpleStateChecker.md

Co-authored-by: Halil İbrahim Kalkan <hi_kalkan@yahoo.com>

docs/en/SimpleStateChecker.md

@@ -113,7 +113,7 @@ myobj2.SimpleStateCheckers.Add(myObjectBatchStateChecker);
 SimpleStateCheckerResult<MyObject> stateCheckerResult = await stateCheckerManager.IsEnabledAsync(new []{ myobj1, myobj2 });
 ````
 
-## Built-in state checker
+## Built-in State Checkers
 
 The `PermissionDefinition`, `ApplicationMenuItem` and `ToolbarItem` objects have implemented state checks and have built-in general state checkers, you can directly use their extension methods.
 
@@ -122,4 +122,4 @@ RequireAuthenticated();
 RequirePermissions(bool requiresAll, params string[] permissions);
 RequireFeatures(bool requiresAll, params string[] features);
 RequireGlobalFeatures(bool requiresAll, params Type[] globalFeatures);
-````
+````