The `after` hook now explicitly mentions that it is executed once after
all the tests in a test suite have completed, regardless of whether the
tests passed or failed. This ensures that cleanup tasks or actions
specified in the after hook are guaranteed to run.

Refs: nodejs#50901

The `afterEach` hook is now documented to be executed after each
individual test in a test suite, irrespective of whether the test passed
or failed. Developers can rely on this hook for performing cleanup or
resetting state after each test.

Refs: nodejs#50901

Refined the language in the documentation for the `after` and
`afterEach`
hooks to enhance clarity. Replaced instances of "note that" with more
direct and concise language for better readability.

Refs: nodejs#50901

Refined the documentation for the `after` and `afterEach` hooks to
enhance clarity. Removed redundant information and retained the
essential details. The revised note now explicitly states that the
`after` and `afterEach` hooks are guaranteed to run, even if tests
within the suite fail.

Refs: nodejs#50901

Adjusted line lengths in the documentation to adhere to the maximum
allowed limit of 80 characters. This change resolves the linting error.

Refs: nodejs#50901