Clarify HTTP event delivery setup

[deepunyk]

The Quickstart now links directly to the HTTP event delivery setup section in the full Bolt for JavaScript guide.

This makes the HTTP path easier to find for developers who are not using Socket Mode.

Checks:

• npm run build
• npm run lint
• npm run test:types
• Focused conversation-context unit test
• git diff --check

The full unit suite passed 476 tests but had one unrelated timeout in the conversation-store test.

Closes #2083

[changeset-bot]

🦋 Changeset detected

Latest commit: 42e9b0a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@slack/bolt	Patch

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[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @deepunyk to sign the Salesforce Inc. Contributor License Agreement.

[deepunyk]

Thanks for the contribution! Before we can merge this, we need @deepunyk to sign the Salesforce Inc. Contributor License Agreement.

done

[deepunyk]

⚠️ No Changeset found

Latest commit: 34520da

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets
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Click here if you're a maintainer who wants to add a changeset to this PR

This PR only updates documentation and does not change package behavior, so no changeset is needed.

[deepunyk]

@salesforce-cla check

[srtaalej]

Thank you for taking the time to open this PR @deepunyk! I'm requesting review from my teammates. In the meantime, could you add a changeset to this PR?

[deepunyk]

In the meantime, could you add a changeset to this PR?

Added the requested patch changeset. Ready for re-review.