Bump prefix-dev/setup-pixi from 0.9.1 to 0.9.3

Bumps [prefix-dev/setup-pixi](https://github.com/prefix-dev/setup-pixi) from 0.9.1 to 0.9.3.
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.9.1...v0.9.3)

---
updated-dependencies:
- dependency-name: prefix-dev/setup-pixi
  dependency-version: 0.9.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/check-lockfile.yaml

@@ -15,7 +15,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v5
 
-    - uses: prefix-dev/[email protected].1
+    - uses: prefix-dev/[email protected].3
       with:
         pixi-version: latest
         cache: true

.github/workflows/pr-tests.yaml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Setup Pixi Environment
-        uses: prefix-dev/[email protected].1
+        uses: prefix-dev/[email protected].3
         with:
           pixi-version: latest
           cache: true