docs(tutorial/cpp): fix link to other tutorials
iOS and android now have separated tutorials, fix a dead-link in the documentation
Closes
@@ -408,7 +408,10 @@ Then, check out the following:
* The [Java build tutorial](java.md) to get started with
building Java applications with Bazel.
-* The [mobile application tutorial](app.md) to get started with
- building mobile applications for Android and iOS with Bazel.
+* The [Android application tutorial](android-app.md) to get started with
+ building mobile applications for Android with Bazel.
+
+* The [iOS application tutorial](ios-app.md) to get started with
+ building mobile applications for iOS with Bazel.
Happy building!
