update TESTING.md

Author: lamdanghoang

src/nautilus-server/src/apps/dataset-marketplace/TESTING.md

@@ -686,7 +686,7 @@ curl -X POST http://localhost:3001/admin/init_seal_key_load \
   }'
 
 # Lưu encoded_request từ response
-export FETCH_KEY_REQUEST=<encoded_request>
+export FETCH_KEY_REQUEST=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
 ```
 
 ### 5.2 Fetch Keys từ Seal Servers (từ local hoặc bất kỳ đâu có internet)