Bump the github-actions group across 1 directory with 2 updates (#55)

Bumps the github-actions group with 2 updates in the / directory: [actions/checkout](https://github.com/actions/checkout) and [prefix-dev/setup-pixi](https://github.com/prefix-dev/setup-pixi).


Updates `actions/checkout` from 4 to 5
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

Updates `prefix-dev/setup-pixi` from 0.8.10 to 0.9.0
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.8.10...v0.9.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: prefix-dev/setup-pixi
  dependency-version: 0.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -29,8 +29,8 @@ jobs:
           - py312
           - py313
     steps:
-      - uses: actions/checkout@v4
-      - uses: prefix-dev/setup-pixi@v0.8.10
+      - uses: actions/checkout@v5
+      - uses: prefix-dev/setup-pixi@v0.9.0
         with:
           pixi-version: v0.42.1
           cache: true

.github/workflows/publish-to-pypi.yml

@@ -6,7 +6,7 @@ jobs:
     name: Build and publish Python 🐍 distributions 📦 to PyPI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with: