It seems the hex.pm SSL certificate is expired.
curl https://hex.pm/
curl: (60) SSL certificate problem: certificate has expired
More details here: https://curl.se/docs/sslcerts.html
It does NOT affect mix deps.get dependencies resolution (at least on my machine). Only when when browsing hex.pm you are shown the NET::ERR_CERT_DATE_INVALID error message in Google Chrome.
Hope this is nothing serious.
