Update usage docs

[Mini256]

Feature Request

I have searched the issues of this repository and believe that this is not a duplicate.

Is your feature request related to a Issue or PR(Optional)

None

Describe the feature you'd like:

Update the ti-challenge-bot documentation so that challenge participants can use ti-challenge-bot more easily.

• Update usage docs

Do you have any ideas on how to implement it?(Optional)

[ti-chi-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
If this issue is safe to close now please do so with /close.
Send feedback to sig-community-infra or Mini256.
/lifecycle stale

[ti-chi-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.
If this issue is safe to close now please do so with /close.
Send feedback to sig-community-infra or Mini256.
/lifecycle rotten