SignTool 0.9.1-beta.26080.1 is broken.

**Describe the bug** Installing the latest signtool beta (which doesn't have an associated release btw) signing nupkgs fails with fail: Sign.Core.IDataFormatSigner[0] The system cannot find the path specified. System.ComponentModel.Win32Exception (3): The system cannot find the path specified. at Sign.Core.Kernel32.ActivationContext..ctor(FileInfo manifestFile) in /_/src/Sign.Core/Native/Kernel32.cs:line 83 at Sign.Core.AzureSignToolSigner.RunSignTool(AuthenticodeKeyVaultSigner signer, FileInfo file, SignOptions options) in /_/src/Sign.Core/DataFormatSigners/AzureSignToolSigner.cs:line 175 **Repro steps** [Signing workflow](https://github.com/blowdart/idunno.Bluesky/blob/1c43f7b579f04d4f80e924c4276a81676f253798/.github/workflows/prerelease-build.yml) Successfully ran at 7am with `Tool 'sign' (version '0.9.1-beta.25379.1') was successfully installed.` Failed at 6pm `Tool 'sign' (version '0.9.1-beta.26080.1') was successfully installed.` Nothing else changed **Expected behavior** Signing succeeds **Actual behavior** Signing files with an exception.