Update prefix-dev/setup-pixi action to v0.9.4

Author: renovate[bot]

.github/workflows/test.yml

@@ -23,7 +23,7 @@ jobs:
       with:
         path: freud-examples
     - name: Create Python Environment
-      uses: prefix-dev/setup-pixi@82d477f15f3a381dbcc8adc1206ce643fe110fb7 # v0.9.3
+      uses: prefix-dev/setup-pixi@a0af7a228712d6121d37aba47adf55c1332c9c2e # v0.9.4
       with:
         pixi-version: v0.54.1
         cache: false