minor updates

.github/workflows/sync-space.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           lfs: true
@@ -25,7 +25,8 @@ jobs:
           SPACE_REPO: shae2977/debugml-env
         run: |
           if [ -z "$HF_TOKEN" ]; then
-            echo "HF_TOKEN secret is not set."
+            echo "GitHub Actions secret HF_TOKEN is not set."
+            echo "Add a Hugging Face write token at: Settings > Secrets and variables > Actions"
             exit 1
           fi