Update README.md package => target

should be target not package

cpp-tutorial/stage3/README.md

@@ -2,7 +2,7 @@
 
 In this stage we step it up and showcase how to integrate multiple ```cc_library``` targets from different packages.
 
-Below, we see a similar configuration from Stage 2, except that this BUILD file is in a subdirectory called lib. In Bazel, subdirectories containing BUILD files are known as packages. The new property below visibility will tell Bazel which other packages that should be able to reference this package. So in this case the ```//main``` package can use this ```cc_library```. 
+Below, we see a similar configuration from Stage 2, except that this BUILD file is in a subdirectory called lib. In Bazel, subdirectories containing BUILD files are known as packages. The new property below visibility will tell Bazel which other packages that should be able to reference this target. So in this case the ```//main``` package can use this ```cc_library```. 
 ```
 cc_library(
     name = "hello-time",