Bump the actions group across 1 directory with 2 updates

Bumps the 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 0.8.8 to 0.8.14
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.8.8...v0.8.14)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: prefix-dev/setup-pixi
  dependency-version: 0.8.14
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/linters.yml

@@ -14,8 +14,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].8
+      - uses: actions/checkout@v5
+      - uses: prefix-dev/[email protected].14
         with:
           pixi-version: v0.39.2
           frozen: true

.github/workflows/tests.yml

@@ -36,8 +36,8 @@ jobs:
               environment: ci-py311-latest-tensorflow
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].8
+      - uses: actions/checkout@v5
+      - uses: prefix-dev/[email protected].14
         with:
           pixi-version: v0.39.2
           environments: ${{ matrix.environment }}