ntp: 4.2.8p10 -> 4.2.8p11 (#40661)

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

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

These checks were done:

- built on NixOS
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/calc_tickadj passed the binary check.
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntp-wait passed the binary check.
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntptrace passed the binary check.
- Warning: no invocation of /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/update-leap had a zero exit code or showed the expected version
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/sntp passed the binary check.
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntpd passed the binary check.
- Warning: no invocation of /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntpdate had a zero exit code or showed the expected version
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntpdc passed the binary check.
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntpq passed the binary check.
- /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntp-keygen passed the binary check.
- Warning: no invocation of /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/ntptime had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11/bin/tickadj had a zero exit code or showed the expected version
- 8 of 12 passed binary check by having a zero exit code.
- 0 of 12 passed binary check by having the new version present in output.
- found 4.2.8p11 with grep in /nix/store/ib7i3wijfdx2h24aswazaqivr6hfrbip-ntp-4.2.8p11
- directory tree listing: https://gist.github.com/643849ae077bac0514537c8aa923dd6d
- du listing: https://gist.github.com/1b2abf7cee80b022945ff72be1eb7070