Enhance firmware update instructions with flasher reference

[lattice0]

Added a reference to NabuCasa's universal-silabs-flasher for advanced users.

I found this by inspecting the web flasher on the toolbox website, by looking into the javascript code. Way too hard to find such information.

[netlify]

✅ Deploy Preview for nabucasa-support-content ready!

Name	Link
🔨 Latest commit	03ba22e
🔍 Latest deploy log	https://app.netlify.com/projects/nabucasa-support-content/deploys/696c4f895ba7440008267c23
😎 Deploy Preview	https://deploy-preview-818--nabucasa-support-content.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[TheJulianJES]

Generally, most users should be able to update firmware using Home Assistant directly.
Otherwise, the OHF Toolbox is recommended to be used for everyone that needs to install custom firmware. As you've found out, it uses the same underlying universal-silabs-flasher.

There's a separate "Reinstalling firmware on ZBT-2" article abut that, but I think it might make sense to have this article include the following as a related topic:

• Reinstalling firmware on Home Assistant Connect ZBT-2 using the Open Home Foundation Toolbox

What was the reason you needed to use the CLI flasher tool in the first place? Did the web-flasher not work for you?

[TheJulianJES]

Also, there's a double space here:

Suggested change

	For more advanced users, you can use NabuCasa's [universal-sibals-flasher](http://github.com/NabuCasa/universal-silabs-flasher)
	For more advanced users, you can use NabuCasa's [universal-sibals-flasher](http://github.com/NabuCasa/universal-silabs-flasher)

[lattice0]

Generally, most users should be able to update firmware using Home Assistant directly. Otherwise, the OHF Toolbox is recommended to be used for everyone that needs to install custom firmware. As you've found out, it uses the same underlying universal-silabs-flasher.

There's a separate "Reinstalling firmware on ZBT-2" article abut that, but I think it might make sense to have this article include the following as a related topic:

• Reinstalling firmware on Home Assistant Connect ZBT-2 using the Open Home Foundation Toolbox

What was the reason you needed to use the CLI flasher tool in the first place? Did the web-flasher not work for you?

I wanted to do an offline rewrite of the firmware before plugging into my trusted setup. The website is not easily auditable, any javascript and firmware could be there.