update pixi version

Author: VeckoTheGecko

.github/workflows/cache-pixi-lock.yml

@@ -29,7 +29,7 @@ jobs:
       - uses: prefix-dev/[email protected]
         if: ${{ !steps.restore.outputs.cache-hit }}
         with:
-          pixi-version: v0.49.0
+          pixi-version: v0.55.0
           run-install: false
       - name: Run pixi lock
         if: ${{ !steps.restore.outputs.cache-hit }}