fix typo

Author: cloudshooterhuman

Part 3 - Taming the sequence/5. Time-shifted sequences.md

@@ -368,7 +368,7 @@ Observable.interval(150, TimeUnit.MILLISECONDS)
 
 ## Throttling
 
-Throttling is also intended for thining out a sequence. When the producer emits more values than we want and we don't need every sequential value, we can thin out the sequence by throttling it.
+Throttling is also intended for thinning out a sequence. When the producer emits more values than we want and we don't need every sequential value, we can thin out the sequence by throttling it.
 
 ### throttleFirst