Fix badly formatted help link for Campfire and Irker integrations

What does this MR do and why?

This MR fixes some badly formatted help links for the following integrations:

• Irker
• Campfire

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Campfire integration:

Before	After

Irker integration:

Before	After

How to set up and validate locally

Visit the integrations list for a project, for example, http://gdk.test:3000/flightjs/Flight/-/settings/integrations, or through Settings > Integrations.

QA that the following integrations format their help text links correctly:

• Irker
• Campfire

On master those integrations have incorrectly formatted links.

Also QA that the other integrations touched in this MR continue to format their help links correctly:

• Datadog
• Discord
• Google Chat (Hangouts)