update version

Author: zhengruifeng

mllib/src/main/scala/org/apache/spark/ml/classification/OneVsRest.scala

@@ -141,11 +141,11 @@ final class OneVsRestModel private[ml] (
   }
 
   /** @group setParam */
-  @Since("2.2.0")
+  @Since("2.1.0")
   def setFeaturesCol(value: String): this.type = set(featuresCol, value)
 
   /** @group setParam */
-  @Since("2.2.0")
+  @Since("2.1.0")
   def setPredictionCol(value: String): this.type = set(predictionCol, value)
 
   @Since("1.4.0")