Restore broken Nix build

[nightkr]

Description

24.7.0 breaks the Nix build for a few reasons:

1. utoipa-swagger-ui now supports file:// URLs (https://github.com/juhaku/utoipa/pull/923), so we need to provide a real file path
2. We now require Go >= 1.22.5, which is not available in the pinned Nixpkgs

This PR fixes 1 directly, and 2 by updating all pinned Nix libraries.

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

# Author

# Reviewer
- [ ] Code contains useful comments
- [ ] (Integration-)Test cases added
- [ ] Documentation added or updated
- [ ] Changelog updated
- [ ] Cargo.toml only contains references to git tags (not specific commits or branches)

# Acceptance
- [ ] Feature Tracker has been updated
- [ ] Proper release label has been added

[nightkr]

Yep, 2 was just a niv update.