Upgrade fails with untrusted Homebrew tap error

[garrytrinder]

Description

When upgrading Dev Proxy via the Dev Proxy Toolkit extension, the upgrade fails with an untrusted tap error.

Error message

Failed to upgrade Dev Proxy: exec error: Error: Command failed: brew upgrade dev-proxy
Error: Refusing to load formula dotnet/dev-proxy/dev-proxy from untrusted tap dotnet/dev-proxy.
Run `brew trust --formula dotnet/dev-proxy/dev-proxy` or `brew trust dotnet/dev-proxy` to trust it.
stderr: Error: Refusing to load formula dotnet/dev-proxy/dev-proxy from untrusted tap dotnet/dev-proxy.
Run `brew trust --formula dotnet/dev-proxy/dev-proxy` or `brew trust dotnet/dev-proxy` to trust it.

Screenshot

Steps to reproduce

1. Install Dev Proxy via Homebrew
2. Open VS Code with the Dev Proxy Toolkit extension
3. Attempt to upgrade Dev Proxy when a new version is available

Expected behavior

Dev Proxy should upgrade successfully.

Actual behavior

Upgrade fails because Homebrew requires the dotnet/dev-proxy tap to be explicitly trusted before it will load formulas from it.

Possible fix

Before running brew upgrade dev-proxy, run brew trust dotnet/dev-proxy to trust the tap, or inform the user to trust the tap manually.