Update pixi workflow to use a more recent pixi version

Author: SeaOtocinclus

.github/workflows/build-and-test-pixi.yml

@@ -26,9 +26,9 @@ jobs:
           sudo rm /etc/paths.d/mono-commands
 
       - name : Setup pixi
-        uses: prefix-dev/setup-pixi@v0.8.1
+        uses: prefix-dev/setup-pixi@v0.8.4
         with:
-          pixi-version: v0.25.0
+          pixi-version: v0.44.0
           cache: false
 
       - name: Build