SignTool 0.9.1-beta.26102.1 is broken

> 0.9.1-beta.26102.1 also appears to be broken: > > ``` > Unhandled exception: Settings file 'DotnetToolSettings.xml' was not found in the package. > ``` > > https://github.com/App-vNext/Polly/pull/2927 _Originally posted by @martincostello in [#978](https://github.com/dotnet/sign/issues/978#issuecomment-3871010435)_