FIX Linux speedtest-cli apt update error

W: GPG error: https://packagecloud.io/ookla/speedtest-cli/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E61C2AB9A6D1557 E: The repository 'https://packagecloud.io/ookla/speedtest-cli/ubuntu focal InRelease' is not signed.

cd /etc/apt/sources.list.d
sudo rm ookla_speedtest-cli.list
sudo rm ookla_speedtest-cli.list.save
sudo apt update && upgrade -y