Bump the actions group with 2 updates

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


Updates `prefix-dev/setup-pixi` from 0.6.0 to 0.8.1
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.6.0...v0.8.1)

Updates `codecov/codecov-action` from 4.0.1 to 4.5.0
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4.0.1...v4.5.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/python-app.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/setup-pixi@v0.6.0
+      - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           pixi-version: v0.19.1
           environments: ${{ matrix.environment }}
@@ -23,7 +23,7 @@ jobs:
         run: pixi run -e ${{ matrix.environment }} test-ragger-duck
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4.0.1
+        uses: codecov/codecov-action@v4.5.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: glemaitre/doc-search-rag-based-llm