[update sycl.md] no DPC++, no Enable SYCL Offload in Visual Studio

[xiaohoua]

follow the SYCL.md.
i want to tun llama.cpp with Visual Studio.
After cmake -B build -G "Visual Studio 17 2022" -A x64 -DGGML_SYCL=ON -DCMAKE_BUILD_TYPE=Release -DSYCL_INCLUDE_DIR="C:\Program Files (x86)\Intel\oneAPI\compiler\latest\include" -DSYCL_LIBRARY_DIR="C:\Program Files (x86)\Intel\oneAPI\compiler\latest\lib" -DLLAMA_CURL=OFF in terminal.
I open the solution in Visual Studio.and Right-click on ggml-sycl and select Properties. But no DPC++, no Enable SYCL:

what should i do ? especially i want to debug with VS. Is this markdown outdated or did I make some mistakes？

[NeoZhangJianyu]

I recommend to use cmd line to build it: https://github.com/ggml-org/llama.cpp/blob/master/docs/backend/SYCL.md#1-script

Not recommend to use VS to debug it.

Use log/printf() is recommended.