Bump prefix-dev/setup-pixi from 0.5.1 to 0.6.0

Bumps [prefix-dev/setup-pixi](https://github.com/prefix-dev/setup-pixi) from 0.5.1 to 0.6.0.
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.5.1...v0.6.0)

---
updated-dependencies:
- dependency-name: prefix-dev/setup-pixi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v4
       - name: Setup Pixi
-        uses: prefix-dev/setup-pixi@v0.5.1
+        uses: prefix-dev/setup-pixi@v0.6.0
       - name: Build with PyInstaller
         run: pixi run build-backend
       - name: Create backend ZIP