[DOC] Change of confusing Large Tensors documentation (#20831)

* Changing confusing documentation

* Rewiev suggestion

Co-authored-by: Andrzej Kotłowski <Andrzej.Kotlowski@intel.com>

Co-authored-by: Andrzej Kotłowski <Andrzej.Kotlowski@intel.com>

Author: DominikaJedynak

config/linux.cmake

@@ -114,11 +114,10 @@ SET(EXTRA_OPERATORS "" CACHE PATH "EXTRA OPERATORS PATH")
 # Create C++ interface package
 set(USE_CPP_PACKAGE OFF CACHE BOOL "Build C++ Package")
 
-# Use int64_t type to represent the total number of elements in a tensor
+# Use int64_t type to represent index and the number of elements in a tensor
 # This will cause performance degradation reported in issue #14496
 # Set to 1 for large tensor with tensor size greater than INT32_MAX i.e. 2147483647
-# Note: the size of each dimension is still bounded by INT32_MAX
-set(USE_INT64_TENSOR_SIZE ON CACHE BOOL "Use int64_t to represent the total number of elements in a tensor")
+set(USE_INT64_TENSOR_SIZE ON CACHE BOOL "Use int64_t to represent the number of elements in a tensor")
 
 # Other GPU features
 set(USE_NCCL "Use NVidia NCCL with CUDA" OFF)