Bump prefix-dev/setup-pixi from 0.8.1 to 0.8.8 (#59)

Author: dependabot[bot]

.github/workflows/main.yml

@@ -48,7 +48,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: pip
           allow-prereleases: true
-      - uses: prefix-dev/setup-pixi@v0.8.1
+      - uses: prefix-dev/setup-pixi@v0.8.8
         with:
           pixi-version: v0.39.4
           run-install: false