docs: replace incorrect mention of channels

[andrew-rosca]

No description provided.

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[asyncapi-bot]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🔴 Performance	36
🟢 Accessibility	98
🟢 Best practices	92
🟢 SEO	100
🔴 PWA	33

Lighthouse ran on https://deploy-preview-3066--asyncapi-website.netlify.app/

[derberg]

lgtm

[sambhavgupta0705]

/update

[sambhavgupta0705]

/update

[sambhavgupta0705]

/update

[sambhavgupta0705]

/rtm

[asyncapi-bot]

Hello, @sambhavgupta0705! 👋🏼
This PR is not up to date with the base branch and can't be merged.
Please update your branch manually with the latest version of the base branch.
PRO-TIP: To request an update from the upstream branch, simply comment /u or /update and our bot will handle the update operation promptly.

       The only requirement for this to work is to enable [Allow edits from maintainers](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork) option in your PR. Also the update will not work if your fork is located in an organization, not under your personal profile.
       Thanks 😄

[sambhavgupta0705]

/update

[sambhavgupta0705]

/rtm