Update msc/csst-msc-l1.json

msc/csst-msc-l1.json

+{
+    "dag": "csst-msc-l1",
+    "parameters": {
+        "dag_run_id": 12345,
+        "message": {
+            "obsid": "10109312345678",
+            "chipid": "09"
+        }
+    }
+}