docs: Update components-scenarios.md (angular#56921)

Fix grammatical issues

PR Close angular#56921

adev/src/content/guide/testing/components-scenarios.md

@@ -82,7 +82,7 @@ Here are three tests that illustrate how automatic change detection works.
 The first test shows the benefit of automatic change detection.
 
 The second and third test reveal an important limitation.
-The Angular testing environment does not run change detection synchronously when updates happenthat the test changed the component's `title`.
+The Angular testing environment does not run change detection synchronously when updates happen inside the test case that changed the component's `title`.
 The test must call `await fixture.whenStable` to wait for another of change detection.
 
 HELPFUL: Angular does not know about direct updates to values that are not signals. The easiest way to ensure that