checkSSLCert: 1.51.0 -> 1.64.0

Semi-automatic update generated by https://github.com/ryantm/nix-update tools.

This update was made based on information from https://repology.org/metapackage/check_ssl_cert/versions.

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 1.64.0 with grep in /nix/store/yiphzx29lcf6zx02g4bh1p80pappzw6f-check_ssl_cert-1.64.0
- directory tree listing: https://gist.github.com/37591ae2c040336904beb8059082afdc