build(deps): bump NuGet/setup-nuget from 1.2.0 to 2.0.0

Bumps [NuGet/setup-nuget](https://github.com/nuget/setup-nuget) from 1.2.0 to 2.0.0.
- [Release notes](https://github.com/nuget/setup-nuget/releases)
- [Commits](NuGet/setup-nuget@296fd3c...a21f25c)

---
updated-dependencies:
- dependency-name: NuGet/setup-nuget
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/windows-matrix.yml

@@ -66,7 +66,7 @@ jobs:
       # NuGet stuff now
 
       - name: Setup NuGet
-        uses: "NuGet/setup-nuget@296fd3ccf8528660c91106efefe2364482f86d6f"
+        uses: "NuGet/setup-nuget@a21f25cd3998bf370fde17e3f1b4c12c175172f9"
         with:
           nuget-version: "5.x"