Bump NuGet/setup-nuget from 1 to 2

Bumps [NuGet/setup-nuget](https://github.com/nuget/setup-nuget) from 1 to 2.
- [Release notes](https://github.com/nuget/setup-nuget/releases)
- [Commits](NuGet/setup-nuget@v1...v2)

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

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

.github/workflows/publish.yml

@@ -18,7 +18,7 @@ jobs:
       uses: microsoft/[email protected]
 
     - name: Setup NuGet
-      uses: NuGet/setup-nuget@v1
+      uses: NuGet/setup-nuget@v2
 
     - name: Restore dependencies
       run: nuget restore src/Eliot.UELib.csproj