[Bug] The nightly job checks different version, not the one freshly created

**Describe the bug**
The nightly action uses `dotnet tool install docfx -g --prerelease` to get the newest version when testing.

https://github.com/dotnet/docfx/actions/runs/34293130495/job/102283830157

This would be OK, provided that the latest version has the highest number. This should be `2.78.6-preview.52`. However, version `2.79.1-preview.3` was pushed to the registry 11 months ago and is now checked every time the nightly action runs, not the version created by the job.

This could also cause problems when you try to install the latest version of DocFX, as with `--prerelease` you woudn't get the newest version. Because of this, version `2.78.6-preview.52` has been downloaded significantly more times than subsequent versions.

**Expected behavior**

The versions should be consistent, with the latest build having the highest version number.

**Additional context**
#11089, #11123

Start with the nightly GitHub Actions run linked in the issue and locate the workflow step invoking `dotnet tool install docfx -g --prerelease`. Trace how the newly created version is published and selected, then verify that nightly checks use that version rather than the older `2.79.1-preview.3` registry entry.

Written by the indexing model from the issue text.