[NFC][SYCL] Update an outdated comment initLocalInvocationId (#19801)

It was renamed to initBuiltInLocalInvocationId in 8fe0c4d

Author: wenju-he

sycl/include/sycl/nd_item.hpp

@@ -9,7 +9,7 @@
 #pragma once
 
 #include <sycl/__spirv/spirv_types.hpp>       // for Scope
-#include <sycl/__spirv/spirv_vars.hpp>        // for initLocalInvocationId
+#include <sycl/__spirv/spirv_vars.hpp> // for initBuiltInLocalInvocationId
 #include <sycl/access/access.hpp>             // for mode, fence_space
 #include <sycl/detail/defines.hpp>            // for __SYCL_ASSUME_INT
 #include <sycl/detail/defines_elementary.hpp> // for __SYCL2020_DEPRECATED, __SY...