Update yeelight.markdown

[jonwaland]

qualify the need to quote off

Proposed change

documentation update as per home-assistant/core#34276

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logo's and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase:
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue: Yeelight custom effects incomplete support core#34276

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

[frenck]

While I do appreciate the contribution in general, I'm not going to merge this in.

This is not a specific issue/thing for this integration, but how YAML works.
We can actually add this warning to almost any place. 🤷

[jonwaland]

@frenck

Maybe https://www.home-assistant.io/docs/configuration/yaml/ should be updated then, given this would likely be a common error

[frenck]

Yeah an addition the common issues sections might be a good idea 👍