Update checkout action for nv-human-eval workflow (deepspeedai#5757)

Update workflows that can be updated to use node20/checkout@v4.

.github/workflows/nv-human-eval.yml

@@ -17,7 +17,7 @@ jobs:
       options: --gpus all --shm-size "8G"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Check container state
         run: |