opendht: 1.7.1 -> 1.7.2

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtnode -h’ got 0 exit code
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtnode --help’ got 0 exit code
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtnode help’ got 0 exit code
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtchat -h’ got 0 exit code
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtchat --help’ got 0 exit code
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtscanner -h’ got 0 exit code
- ran ‘/nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2/bin/dhtscanner --help’ got 0 exit code
- found 1.7.2 with grep in /nix/store/j00w2x6mfk421h6z7ma1ndvp0yy3is7g-opendht-1.7.2
- directory tree listing: https://gist.github.com/bae66cd16ade0c7ae0789b34e0528267