Bump prefix-dev/setup-pixi from 0.8.3 to 0.8.4 (#2760)

Bumps [prefix-dev/setup-pixi](https://github.com/prefix-dev/setup-pixi) from 0.8.3 to 0.8.4.
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.8.3...v0.8.4)

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

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

Author: dependabot[bot]

.github/workflows/build_docs_gallery.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       with:
         pixi-version: latest
         cache: true

.github/workflows/lint.yml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v4
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       with:
         pixi-version: latest
         cache: true
@@ -31,7 +31,7 @@ jobs:
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v4
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       with:
         pixi-version: latest
         cache: true

.github/workflows/testing-all-oses.yml

@@ -21,7 +21,7 @@ jobs:
         os: ["macos-13", "macos-14", "ubuntu-latest"]
     steps:
     - uses: actions/checkout@v4
-    - uses: prefix-dev/[email protected].3
+    - uses: prefix-dev/[email protected].4
       with:
         pixi-version: latest
         cache: true

.github/workflows/update-pixi-lockfile.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           ref: ${{ matrix.base_branch }}
       - name: Generate new lockfile
-        uses: prefix-dev/[email protected].3
+        uses: prefix-dev/[email protected].4
         with:
           pixi-version: latest
           run-install: false