fix typo for example exclamation topology (#1030)

diff --git a/website/content/docs/getting-started.md b/website/content/docs/getting-started.md
index 5448451..6e80f14 100644
--- a/website/content/docs/getting-started.md
+++ b/website/content/docs/getting-started.md
@@ -250,7 +250,7 @@
   for each component.
 * `CustomGroupingTopology.java` --- A topology that implements custom grouping.
 * `ExclamationTopology.java` --- A spout that emits random words to a bolt that
-  then adds an explanation mark.
+  then adds an exclamation mark.
 * `MultiSpoutExclamationTopology.java` --- a topology with multiple spouts.
 * `MultiStageAckingTopology.java` --- A three-stage topology. A spout emits to a
   bolt that then feeds to another bolt.