Update the certificates on Ubuntu 16.04 TLS [closed]
Solution 1:
If your system was upgraded you'd be using the following package
ca-certificates 20210119~16.04.1ubuntu0.1~esm1
But you've not updated your Ubuntu 16.04 LTS system, even though support ended in April 2021. Why are you surprised?
If you want to continue using Ubuntu 16.04 ESM, enable ESM and get the upgraded packages.
Ubuntu 16.04 LTS however is off-topic here. Please refer https://askubuntu.com/help/on-topic and you'll see only supported (standard or public) releases of Ubuntu are on-topic here.