docs(slack-documentation): update the documentation for slack connector

[mathias-vandaele]

update the documentation for slack connector, we can now use channel ID to invite users into channel

Description

camunda/connectors#2695

We can now invite new users into a channel using the Channel ID

It will be available in 8.6.0-alpha4-rc2 of connectors

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[github-actions]

👋 🤖 🤔 Hello! Did you make your changes in all the right places?

These files were changed only in docs/. You might want to duplicate these changes in versioned_docs/version-8.5/.

• docs/components/connectors/out-of-the-box-connectors/slack.md

You may have done this intentionally, but we wanted to point it out in case you didn't. You can read more about the versioning within our docs in our documentation guidelines.

[christinaausley]

@mathias-vandaele Just let @camunda/tech-writers know when you're ready for review 👍

[christinaausley]

@mathias-vandaele Do you want this to go out with the alpha tomorrow? If so, we'll likely need an engineering and technical writer review on this ASAP.

[akeller]

Hello @mathias-vandaele - it's the end of my day here in the US, but it's not clear to me if this PR is ready to merge for the alpha release tomorrow. Please remove the hold label and ping us on ask-c8-documentation for a review, merge, and release. I've added @sbuettner as a reviewer as well, but feel free to add a different engineering reviewer.

[mesellings]

Hi @mathias-vandaele - is this PR ready to merge for the alpha release today please?

If so, please remove the hold label and ping us on ask-c8-documentation for a review, merge, and release, or Slack me directly. We've added @sbuettner as a reviewer as well, but feel free to add a different engineering reviewer.

[mathias-vandaele]

Hi @mathias-vandaele - is this PR ready to merge for the alpha release today please?

If so, please remove the hold label and ping us on ask-c8-documentation for a review, merge, and release, or Slack me directly. We've added @sbuettner as a reviewer as well, but feel free to add a different engineering reviewer.

Hi @mesellings
It is ready to merge for the alpha released.
The hold label has been removed, I also sent a message in the ask-c8-documentation channel

[mesellings]

Hi @mathias-vandaele thank you - I will perform a review for you and we can get it merged today 👍

[mesellings]

@mathias-vandaele LGTM, I made a few edits as some ordered lists should be bullet lists, and tidied up a few sentence fragments. Approved 👍