Bump the dependencies group with 3 updates

Bumps the dependencies group with 3 updates: [actions/checkout](https://github.com/actions/checkout), [prefix-dev/setup-pixi](https://github.com/prefix-dev/setup-pixi) and [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv).


Updates `actions/checkout` from 4 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

Updates `prefix-dev/setup-pixi` from 0.9.3 to 0.9.4
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.9.3...v0.9.4)

Updates `astral-sh/setup-uv` from 6 to 7
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dependencies
- dependency-name: prefix-dev/setup-pixi
  dependency-version: 0.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: astral-sh/setup-uv
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dependencies
...

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

Author: dependabot[bot]

.github/workflows/copilot-setup-steps.yml

@@ -25,7 +25,7 @@ jobs:
         shell: bash -l {0}
     steps:
       - name: Checkout code with submodule
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
           fetch-depth: 0
@@ -36,12 +36,12 @@ jobs:
           toolchain: stable
 
       - name: setup pixi
-        uses: prefix-dev/[email protected].3
+        uses: prefix-dev/[email protected].4
         with:
           pixi-version: v0.59.0
           run-install: false
       - name: Install uv
-        uses: astral-sh/setup-uv@v6
+        uses: astral-sh/setup-uv@v7
         with:
           # Install a specific version of uv.
           version: "0.9.10"