add hostnameInCertificate to JDBC Client Docs

[thepetlyon]

Description

add hostnameInCertificate to JDBC Client Docs.

Additional context and related issues

Adding changes pushed in #17939.

Release notes

(X) This is not user-visible or docs only and no release notes are required.
( ) Release notes are required, please propose a release note for me.
( ) Release notes are required, with the following suggested text:

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Peter Lyons.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[mosabua]

Thank you for sending this. Please update and then I am happy to merge.

[thepetlyon]

Thank you for sending this. Please update and then I am happy to merge.

Committed! Thank you!