No more T-rex github page??

Ok so my miners are using the latest 20.3 version of kawpow right now…

When i log into my miners they say this :

UA Infra: Extended Security Maintenance (ESM) is not enabled.

9 additional security updates can be applied with UA Infra: ESM

Learn more about enabling UA Infra: ESM service at https://ubuntu.com/esm

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From what I understand if you update ubuntu (im using linux) to a newer version it will create issues with mining…

What exactly does this ESM update do other than "security"? Should I just go ahead and enable ESM or just keep doing what Im doing?

Also, why are there no more repos on the link here? https://github.com/trexminer/T-Rex/releases/

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TIA.