Add explain for register TaintTolerationPriority function.

plugin/pkg/scheduler/algorithmprovider/defaults/defaults.go

@@ -225,7 +225,7 @@ func defaultPriorities() sets.String {
 		// Prioritizes nodes that have labels matching NodeAffinity
 		factory.RegisterPriorityFunction2("NodeAffinityPriority", priorities.CalculateNodeAffinityPriorityMap, priorities.CalculateNodeAffinityPriorityReduce, 1),
 
-		// TODO: explain what it does.
+		// Prioritizes nodes that marked with taint which pod can tolerate.
 		factory.RegisterPriorityFunction2("TaintTolerationPriority", priorities.ComputeTaintTolerationPriorityMap, priorities.ComputeTaintTolerationPriorityReduce, 1),
 	)
 }