Update pixi version to v0.70.2

Author: WhiteSymmetry

.github/workflows/pixi.yml

@@ -104,7 +104,7 @@ jobs:
       - name: Setup pixi
         uses: prefix-dev/setup-pixi@v0.9.6
         with:
-          pixi-version: v0.47.0
+          pixi-version: v0.70.2
           cache: true
 
       - name: Build Python package