Ubuntu 20.04 not letting install SDK 6

Im getting this when executing this command on ubuntu 20.04.
```bash
sudo apt-get update; sudo apt-get install -y apt-transport-https && sudo apt-get update && sudo apt-get install -y dotnet-sdk-6.0
```

I can't update my local repository anymore until I remove it from my sources.list.d

I know this isn't an actual issue with the sdk, this seems like a web server issue as I cannot ping your servers or download anything from them.