xpra: 2.2.6 -> 2.3

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

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

These checks were done:

- built on NixOS
- /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/xpra passed the binary check.
- Warning: no invocation of /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/xpra_Xdummy had a zero exit code or showed the expected version
- /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/xpra_udev_product_version passed the binary check.
- Warning: no invocation of /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/.xpra_browser-wrapped had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/xpra_browser had a zero exit code or showed the expected version
- /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/.xpra_launcher-wrapped passed the binary check.
- /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/xpra_launcher passed the binary check.
- Warning: no invocation of /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/.xpra_signal_listener-wrapped had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/xpra_signal_listener had a zero exit code or showed the expected version
- /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/..xpra-wrapped-wrapped passed the binary check.
- /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3/bin/.xpra-wrapped passed the binary check.
- 6 of 11 passed binary check by having a zero exit code.
- 0 of 11 passed binary check by having the new version present in output.
- found 2.3 with grep in /nix/store/qj6c3wgczrd94h9xc80nx6idcimyx77r-xpra-2.3
- directory tree listing: https://gist.github.com/9e03a45b8255a45b7df6fbcf24b6f408
- du listing: https://gist.github.com/a48b995e2d458e3b9da00ae42675dbe6