Add (y/N) input checks

[rchtgpt]

Describe the bug
Entering anything other than y/Y and n/N should not be considered correct.

To Reproduce
Steps to reproduce the behavior:

1. Run gtg config
2. Choose any commit title
3. Enter anything expect y and N in Would you be using emojis in your commit messages?(y/n)
4. It will consider it as N.

Expected behavior
Should instead ask the question again.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: macOS Big Sur 11.0.1