QmidiNet: 0.5.0 -> 0.5.1 (#41045)

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/35mfmy2vrhd1535lbpfdz00mfpcc3rpi-qmidinet-0.5.1/bin/qmidinet had a zero exit code or showed the expected version
- 0 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 0.5.1 with grep in /nix/store/35mfmy2vrhd1535lbpfdz00mfpcc3rpi-qmidinet-0.5.1
- directory tree listing: https://gist.github.com/899bb536df375d3d1430d5c4883c0429
- du listing: https://gist.github.com/9492519fd9c0cb3b24bfda691ddb03ba