Improve wording for chatops account activation

What does this MR do and why?

Improve wording for chatops account activation

Changelog: changed

Why this change?

An account deactivation can be indicative of employment termination in certain contexts. This change makes it clear that the account can probably be reactivated.

For example, there is a feature to deactivate users which have not logged in for 90 days (or another duration set in the admin panel), so the next action should be more clear.

See more at https://gitlab.slack.com/archives/C02PF508L/p1686921497473029 (company internal)

Screenshots or screen recordings

This is the message that's changing, it promted in Slack when using e.g. a ChatOps command.

How to set up and validate locally

NA

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.