No delay after final retry on max attempts

[StounhandJ]

This MR addresses an issue where a delay is still applied after the final attempt, even when the maximum number of attempts for a specific error type has been reached.

Problem:
When using the retry.AttemptsForError() option to define a custom attempt limit for a specific error type, the retry logic still applies the configured delay after the final permitted attempt for that error. This results in unnecessary wait time and inconsistent behavior.

Steps to Reproduce:

pacakge main

var count uint64 = 0
var currentTime = time.Now()

type TestError struct {
}

func (TestError) Error() string {
	return ""
}

func action() error {
	count += 1
	fmt.Printf("Attempts: %v; Time: %v\n", count, time.Since(currentTime).Round(time.Second))
	currentTime = time.Now()

	return TestError{}
}

func main() {
	_ = retry.Do(action,
		retry.Attempts(3),
		retry.Delay(2*time.Second),
		retry.DelayType(retry.FixedDelay),
		retry.AttemptsForError(2, TestError{}),
		retry.LastErrorOnly(true),
		retry.Context(context.Background()))

	fmt.Printf("End Time: %v\n", time.Since(currentTime).Round(time.Second))
}

Observed Output:

Attempts: 1; Time: 0s
Attempts: 2; Time: 2s
End Time: 2s

Expected Output:

Attempts: 1; Time: 0s
Attempts: 2; Time: 2s
End Time: 0s