Update dotnet.yml

don't package the unit tests.

Author: resc

.github/workflows/dotnet.yml

@@ -56,7 +56,7 @@ jobs:
 
     # Create the NuGet package in the folder from the environment variable NuGetDirectory
     - name: Pack
-      run: dotnet pack ./src --configuration Release --no-build --no-restore --output ${{ env.NuGetDirectory }}
+      run: dotnet pack ./src/Cubist.Helium --configuration Release --no-build --no-restore --output ${{ env.NuGetDirectory }}
 
     # Publish the NuGet package as an artifact, so they can be used in the publish job
     - uses: actions/upload-artifact@v3