Fix typos 2 (#842)

Co-authored-by: Haicheng Wu <57973641+hwu36@users.noreply.github.com>

tools/profiler/src/gpu_timer.cpp

@@ -94,7 +94,7 @@ void GpuTimer::stop_and_wait(cudaStream_t stream) {
   }
 }
 
-/// Returns the duration in miliseconds
+/// Returns the duration in milliseconds
 double GpuTimer::duration(int iterations) const {
 
   float avg_ms;