Proposed change

This fixes an issue where trying to set up Home Assistant hardware (ZBT or Yellow) for Thread on a system not running Home Assistant OS leads to a corrupted message.

The message is adjusted to no longer display the docs_web_flasher_url, which wasn't even provided in the first place. We no longer need to show this, as the hardware integration installs OpenThread firmware in the step before this.

Users running a non-Home Assistant OS system will only need to set up a OpenThread border router container themselves. This is reflected by adding/keeping "manually" in the shown message (for setting up OTBR).

Open to suggestions if we want to adjust the message further.
I don't think we can (nor should) link the user anything on how to configure OTBR themselves though.

Before:

After:

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
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Additional information

• This PR fixes or closes issue: fixes #
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