fix: Update active date only for users activated and not banned.

[warcooft]

Description See https://github.com/codeigniter4/shield/discussions/1179#discussion-7084659

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [ ] Unit testing, with >80% coverage
• [x] User guide updated
• [x] Conforms to style guide

[kenjis]

Because the existing PHPUnit tests do not fail, there seems no test code for recordActiveDate. I would like you to add test code:

• does not update active date for a user that is not activated
• does not update active date for a user that is banned