Update pixi lock file

[github-actions]

Update pixi dependencies to the latest version.

[visr]

TeamCity still has pixi 0.20.1, and the current pixi 0.22 has a higher lockfile format 5, so we cannot merge this until TeamCity is updated for Windows and Linux. @Jingru923 can you set that process in motion?

  pixi 0.20.1
13:49:27     × Failed to load lock file from `D:
13:49:27     │ \buildAgent\work\ecd2b8f9b25b1609\ribasim\pixi.lock`
13:49:27     ╰─▶ found newer lockfile format version 5, but only up to including version
13:49:27         4 is supported.

I'll do an update with an older version manually since we do seem to need some updates.