[SYCL] Windows default build instructions without -DLLAMA_SYCL_F16 flag activated (#6767)

* Fix FP32/FP16 build instructions

* Fix typo

* Recommended build instruction

Co-authored-by: Neo Zhang Jianyu <jianyu.zhang@intel.com>

* Recommended build instruction

Co-authored-by: Neo Zhang Jianyu <jianyu.zhang@intel.com>

* Recommended build instruction

Co-authored-by: Neo Zhang Jianyu <jianyu.zhang@intel.com>

* Add comments in Intel GPU linux

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Co-authored-by: Anas Ahouzi <112881240+aahouzi-intel@users.noreply.github.com>
Co-authored-by: Neo Zhang Jianyu <jianyu.zhang@intel.com>