doc: clarify after and afterEach hooks execution

doc/api/test.md

@@ -1420,6 +1420,12 @@ describe('tests', async () => {
 });
 ```
 
+**Note:** The `after` hook is executed once after all the tests
+in a test suite have completed, regardless of whether the tests
+passed or failed. This hook is useful for performing cleanup tasks
+or actions that should occur after the entire test suite has been run.
+The `after` hook is guaranteed to run, even if tests within the suite fail.
+
 ## `beforeEach([fn][, options])`
 
 <!-- YAML
@@ -1473,6 +1479,12 @@ added:
 This function is used to create a hook running
 after each subtest of the current test.
 
+**Note:** The `afterEach` hook is executed after each individual test
+in a test suite, regardless of whether the test passed or failed.
+This hook is commonly used for cleaning up resources or resetting state
+between tests. The `afterEach` hook is guaranteed to run after every test,
+even if any of the tests fail.
+
 ```js
 describe('tests', async () => {
   afterEach(() => console.log('finished running a test'));