Update chest-all.yml

Actions v3 in workflow to match with new tools

.github/workflows/chest-all.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2 # or 3
+      - uses: actions/checkout@v3 # or 3
       - name: Setup smalltalkCI
         uses: hpi-swa/setup-smalltalkCI@v1
         with: