integration-docs: Update the RSS integration doc.

[Niloth-p]

Screenshots

RSS doc link

Self-review checklist

• [ ] Self-reviewed the changes for clarity and maintainability (variable names, code reuse, readability, etc.).

Communicate decisions, questions, and potential concerns.

• [ ] Explains differences from previous plans (e.g., issue description).
• [ ] Highlights technical choices and bugs encountered.
• [ ] Calls out remaining decisions and concerns.
• [ ] Automated tests verify logic where appropriate.

Individual commits are ready for review (see commit discipline).

• [x] Each commit is a coherent idea.
• [x] Commit message(s) explain reasoning and motivation for changes.

Completed manual review and testing of the following:

• [x] Visual appearance of the changes.
• [ ] Responsiveness and internationalization.
• [x] Strings and tooltips.
• [ ] End-to-end functionality of buttons, interactions and flows.
• [ ] Corner cases, error conditions, and easily imagined bugs.

[Niloth-p]

Thank you for the review! Updated as recommended. I've switched to using backticks instead of double quotes for channel and topic names, and added the prefix # in front of channel names (because that's the convention in the Help docs - example).

Screenshots

[alya]

OK, I'm happy for other reviewers (@timabbott ?) to take the next look.