Bump prefix-dev/setup-pixi from 0.8.8 to 0.9.1 (#65)

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@v0.8.8
+      - uses: prefix-dev/setup-pixi@v0.9.1
         with:
           pixi-version: v0.39.4
           run-install: false