mutt: 1.9.5 -> 1.10.0 (#40846)

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

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

These checks were done:

- built on NixOS
- /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0/bin/mutt passed the binary check.
- /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0/bin/pgpring passed the binary check.
- Warning: no invocation of /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0/bin/pgpewrap had a zero exit code or showed the expected version
- /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0/bin/muttbug passed the binary check.
- /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0/bin/flea passed the binary check.
- Warning: no invocation of /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0/bin/smime_keys had a zero exit code or showed the expected version
- 4 of 6 passed binary check by having a zero exit code.
- 0 of 6 passed binary check by having the new version present in output.
- found 1.10.0 with grep in /nix/store/ydny2lhs0idsg1hxzkgi198n9jn17rcw-mutt-1.10.0
- directory tree listing: https://gist.github.com/2b53d5dc44b600872e77911ba7099e1c
- du listing: https://gist.github.com/4caca5d9043a5281a6b192ebaf30065f