Update of Ubiquiti and Unifi logos

[kongo09]

Proposed change

Ubiquiti is no longer called Ubiquiti Networks, so the logo is outdated and doesn't exist anymore. Ubiquiti is now using the icon also as a logo on their website and official communication.

Unifi has been developed as an independent brand. While it is still using the same icon as Ubiquiti, it uses its own logo.

Type of change

• [x] Add a new logo or icon for a new core integration
• [ ] Add a missing icon or logo for an existing core integration
• [ ] Add a new logo or icon for a custom integration (custom component)
  • [ ] I've opened up a PR for my custom integration on the Home Assistant Python wheels repository
• [ ] Replace an existing icon or logo with a higher quality version
• [x] Replace an existing icon or logo after a branding change
• [x] Removing an icon or logo

Additional information

• This PR fixes or closes issue: fixes #
• Link to code base pull request:
• Link to documentation pull request:
• Link to integration documentation on our website:

Checklist

• [x] The added/replaced image(s) are PNG
• [x] Icon image size is 256x256px (icon.png)
• [x] hDPI icon image size is 512x512px for ([email protected])
• [x] Logo image size has min 128px, but max 256px, on the shortest side (logo.png)
• [x] hDPI logo image size has min 256px, but max 512px, on the shortest side ([email protected])