ci-windows: update pixi

Author: paugier

.github/workflows/ci-windows.yml

@@ -15,7 +15,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: prefix-dev/setup-pixi@v0.9.3
       with:
-        pixi-version: v0.59.0
+        pixi-version: v0.63.2
         cache: false
     - name: Tests
       run: |