01_stream_basic.cu we must synchronize stream2. getting error for vectorAdd

<img width="654" height="245" alt="Image" src="https://github.com/user-attachments/assets/f739defd-62e1-4172-9922-96a241201d3e" /> `CHECK_CUDA_ERROR(cudaStreamSynchronize(stream2)); ` after line 50 should solve this issue