Fixed print statements in GettingStarted.md (#2112)

A couple of print statements were missing. The print output should line up correctly with the code now.

Documentation/GettingStarted.md

@@ -443,19 +443,28 @@ let subscription1 = counter
     .subscribe(onNext: { n in
         print("First \(n)")
     })
+
+print("Subscribed")
+
 let subscription2 = counter
     .subscribe(onNext: { n in
         print("Second \(n)")
     })
+
+print("Subscribed")
 
 Thread.sleep(forTimeInterval: 0.5)
 
 subscription1.dispose()
 
+print("Disposed")
+
 Thread.sleep(forTimeInterval: 0.5)
 
 subscription2.dispose()
 
+print("Disposed")
+
 print("Ended ----")
 ```