windows install.ps1 fails -`msi` is missing for `v0.99.8`

this appears to be related:

https://github.com/newrelic/newrelic-cli/actions/runs/16314716420/job/46078459530

<img width="884" height="810" alt="Image" src="https://github.com/user-attachments/assets/912e90b2-1c2a-46fb-9cac-1065e702c2a6" />