[Doc] Fixed a typo in Cookbook / Topic compaction (#4544)

## Motivation
Improving the quality of the documentation.

site2/docs/cookbooks-compaction.md

@@ -17,7 +17,7 @@ To use compaction:
 
 ## When should I use compacted topics? {#when}
 
-The classic example of a topic that could benefit from compaction would be a stock ticker topic through which consumers can access up-to-date values for specific stocks. Imagine a scneario in which messages carrying stock value data use the stock symbol as the key (`GOOG`, `AAPL`, `TWTR`, etc.). Compacting this topic would give consumers on the topic two options:
+The classic example of a topic that could benefit from compaction would be a stock ticker topic through which consumers can access up-to-date values for specific stocks. Imagine a scenario in which messages carrying stock value data use the stock symbol as the key (`GOOG`, `AAPL`, `TWTR`, etc.). Compacting this topic would give consumers on the topic two options:
 
 * They can read from the "original," non-compacted topic in case they need access to "historical" values, i.e. the entirety of the topic's messages.
 * They can read from the compacted topic if they only want to see the most up-to-date messages.