use correct package name in package object docs

Author: benjaminran

_tour/package-objects.md

@@ -37,12 +37,12 @@ object Plum extends Fruit("Plum", "blue")
 object Banana extends Fruit("Banana", "yellow")
 ```
 
-Now assume you want to place a variable `planted` and a method `showFruit` directly into package `gardening`.
+Now assume you want to place a variable `planted` and a method `showFruit` directly into package `gardening.fruits`.
 Here's how this is done:
 
 ```
 // in file gardening/fruits/package.scala
-package gardening
+package gardening.fruits
 package object fruits {
   val planted = List(Apple, Plum, Banana)
   def showFruit(fruit: Fruit): Unit = {