Update test.yml

upgrading actions from v2 to v3 (v2 is deprecated node version 12)

Author: heikoklein

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Get machine info
         run: |