Changed the arg dir

Author: TejaX-Alaghari

clang/runtime/dpct-rt/include/dpct/shmem_utils.hpp

@@ -13,7 +13,7 @@ namespace dpct::shmem {
 
 /// Signal Operations
 /// Update signal address with signal using signal operation
-/// \param [in] sig_addr Address of the signal to be updated
+/// \param [out] sig_addr Address of the signal to be updated
 /// \param [in] signal Value of the signal to update
 /// \param [in] sig_op Operator used in updating signal address
 /// \param [in] PE Processing element