misc: update pixi versions in pipeline

Author: tony-p

.github/workflows/pixi.yaml

@@ -13,9 +13,9 @@ jobs:
     steps:
       # Pixi is the tool used to create/manage conda environment
       - uses: actions/checkout@v3
-      - uses: prefix-dev/setup-pixi@v0.4.1
+      - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: v0.16.1
+          pixi-version: v0.40.3
       - name: Build
         run: pixi run build
       - name: Run tests