Set pixi version

Author: ManifoldFR

.github/workflows/macos-linux-pixi.yml

@@ -47,7 +47,7 @@ jobs:
 
     - uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.34.0
+        pixi-version: v0.39.2
         cache: true
         environments: ${{ matrix.environment }}