[ci skip] Fix comment typo noticed in early analysis

core/src/HIP/Kokkos_HIP_Parallel_MDRange.hpp

@@ -241,7 +241,7 @@ class ParallelReduce<FunctorType, Kokkos::MDRangePolicy<Traits...>, ReducerType,
       // Number of blocks is bounded so that the reduction can be limited to two
       // passes. Each thread block is given an approximately equal amount of
       // work to perform. Accumulate the values for this block. The accumulation
-      // ordering does not match the final pass, but is arithmatically
+      // ordering does not match the final pass, but is arithmetically
       // equivalent.
 
       this->exec_range(value);