Fixes on Slack Connector Documentation file

[andrianalazana]

Description

This pull request addresses documentation issues in the Slack connector. While navigating through the Slack connector process, I identified several errors in the documentation and meticulously corrected them.

Status

READY

Type of change

• Documentation (fix or adds documentation)

How Has This Been Tested?

I've connected Opsdroid to Slack twice, paying close attention each time. I found errors and misunderstandings in the documentation, so I suggested improvements.

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation (if applicable)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[jacobtomlinson]

Thanks for this @andrianalazana. We recently merged a log of fixes to CI so if you update your PR to the latest commit and resolve the conflicts things should pass here.

[jacobtomlinson]

Now that #2038 has been merged could you clean this PR up?

[andrianalazana]

I've made the changes. Let me know if something else is missing! Thanks

[andrianalazana]

Hi @jacobtomlinson it's been a while. Is theresomething else to fix for thid prq? Pls let me know.

[jacobtomlinson]

I'm afraid things still aren't in a state where this can be merged. The note block needs to be put back to how it was, and the indentation needs fixing.

Also it looks like there are some merge conflicts that need to be resolved before I can merge this in.

Please can you take a look?

[jacobtomlinson]

This is MyST syntax, but unfortunately we do not use that here. Please can you revert this exactly as it was.

```eval_rst
.. note::
   ...
```

[andrianalazana]

This is how the note was formatted before my changes:

```{note}
You should follow the instructions for the Event API first when configuring your slack connector, even if you are planning
on using slack in Socket Mode.

Shoudn't I put it like this again?

[andrianalazana]

@jacobtomlinson I've made all the necessary changes. However, the Read the Docs build failed. It appears there's a problem with the block declaration using eval_rst which I modified. Additionally, the build failed due to a missing cross-reference target 'usage' in slack.md, which I did not change. Any help resolving these issues would be appreciated.

[andrianalazana]

Hi @jacobtomlinson. Have a nice week! Could you review the changes in order to clean this pr?