Update zha.markdown with info about ITead new dongle and Sonoff ZBBridge

[Hedda]

Proposed change

Update ZHA integration documentation with the latest information about ITead's new USB-dongle and their Sonoff ZBBridge:

1. Added "ITead Zigbee 3.0 USB Dongle (EFR32MG21) Model 9888010100045" to known working Zigbee modules, see forum.
2. As per Consider removing the ITEAD Sonoff ZBBridge from ZHA integration list of hardware as EZSP over WiFi-based bridges is often not stable #17170 added comment about recommendation not to use ITead Sonoff ZBBridge as an EZSP WiFi bridge with ZHA.

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: Consider removing the ITEAD Sonoff ZBBridge from ZHA integration list of hardware as EZSP over WiFi-based bridges is often not stable #17170

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.