This is a bit besides the CLI tool itself, but the Debian repository started reporting errors regarding an expired certificate today.
Err:21 https://repo.jotta.us/debian debian Release
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 185.179.128.26 443]
This is a bit besides the CLI tool itself, but the Debian repository started reporting errors regarding an expired certificate today.
Going to https://repo.jotta.us/debian in Firefox does not give any warnings though.