update setup-nuget action

Author: neoscie

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
         run: 'sed -i -e "s/{{NuGetVersion}}/$NUGET_VERSION/g" *.nuspec'
 
       - name: Setup NuGet.exe for use with actions
-        uses: NuGet/setup-nuget@v1.2.0
+        uses: NuGet/setup-nuget@v2
 
       - name: Create main package
         run: nuget pack Neolution.CodeAnalysis.nuspec