Update stats defaults

mtglib/internal/doppel/stats.go

 	// do not calculate statistics if we have < than this number of durations
 	MinDurationsToCalculate = 100
 
-	// these values are taken from ok-cdn. measured from moscow site.
-	StatsDefaultK      = 1.2908978568647322
-	StatsDefaultLambda = 1.4258402622793287
+	// these values are taken from ok.ru. measured from moscow site.
+	StatsDefaultK      = 0.37846373895785335
+	StatsDefaultLambda = 1.73177086015485
 )
 
 // Stats is responsible for generating values that are distributed according