Add NRK TV and NRK Radio to supported apps

[lersveen]

Proposed change

Update documentation for Google Cast integration with new apps NRK TV and NRK Radio supported in the pychromecast library (version 13.1.0) used by HomeAssistant.

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 logos 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: Bump pychromecast to 13.1.0 core#108073
• Link to pychromecast pull request: Add support for NRK TV and NRK Radio apps home-assistant-libs/pychromecast#777

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]

Thanks, @lersveen 👍

../Frenck