Modify the user guide of the insert() method to include the second parameter

[tbobker123]

Description
The insert method takes 2 paraemtres, but only 1 parametre has been detailed. Furthermore, the description currently details using the getInsertID() to get the rows insert id, but this is already the default return value, so it doesn't make sense to add this to the description.

Checklist:

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

[kenjis]

Thank you for sending the PR!

You forgot the signing to your commits.
See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md#signing

[tbobker123]

Commits not getting verified. Need to fix that.

[tbobker123]

The suggestions were perfect. Thank you.

[kenjis]

The contents seem good!

Please squash the commits, and sign.
Because there are some commits without signing.

[tbobker123]

Its possible my squash / commit went wrong!

[tbobker123]

Yep, it squashed into the wrong commit. I'll do it again.

[kenjis]

Thank you!