ci(nuget): make dotnet pack deterministic

by adding the flag `-p:ContinuousIntegrationBuild=true`

Signed-off-by: Simon Eßlinger <github@esslinger.dev>

.github/workflows/nuget.yml

@@ -35,6 +35,6 @@ jobs:
 
     - name: Push to NuGet
       run: |
-        dotnet pack -c Release -o $PWD/nuget
+        dotnet pack -c Release -p:ContinuousIntegrationBuild=true -o $PWD/nuget
         for file in nuget/*.nupkg; do dotnet nuget push -s https://api.nuget.org/v3/index.json -k ${{secrets.NUGET_API_KEY}} $file; done