build(deps): bump prefix-dev/setup-pixi from 0.9.3 to 0.9.4

Bumps [prefix-dev/setup-pixi](https://github.com/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)

---
updated-dependencies:
- dependency-name: prefix-dev/setup-pixi
  dependency-version: 0.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/macos-linux-windows-pixi.yml

@@ -80,7 +80,7 @@ jobs:
         key: ccache-macos-linux-windows-pixi-${{ matrix.os }}-${{ matrix.build_type }}-${{ matrix.cxx_options }}-${{ matrix.environment }}-${{ github.sha }}
         restore-keys: ccache-macos-linux-windows-pixi-${{ matrix.os }}-${{ matrix.build_type }}-${{ matrix.cxx_options }}-${{ matrix.environment }}-
 
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       with:
         cache: true
         environments: ${{ matrix.environment }}
@@ -135,7 +135,7 @@ jobs:
         key: ccache-python-standalone-macos-linux-windows-pixi-${{ matrix.os }}-${{ matrix.environment }}-${{ github.sha }}
         restore-keys: ccache-python-standalone-macos-linux-windows-pixi-${{ matrix.os }}-${{ matrix.environment }}-
 
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       with:
         cache: true
         environments: ${{ matrix.environment }}
@@ -186,7 +186,7 @@ jobs:
       with:
         submodules: recursive
 
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       env:
         CMAKE_BUILD_PARALLEL_LEVEL: 2
       with:

.github/workflows/update_pixi_lockfile.yml

@@ -27,7 +27,7 @@ jobs:
           persist-credentials: false
 
       - name: Set up pixi
-        uses: prefix-dev/[email protected].3
+        uses: prefix-dev/[email protected].4
         with:
           run-install: false