HOTFIX: fix broken link for wordcount demo example

Author: Matthias J. Sax <matthias@confluent.io>

Reviewers: Guozhang Wang <wangguoz@gmail.com>

Closes #2644 from mjsax/hotfixBrokerLink

docs/quickstart.html

@@ -282,7 +282,7 @@ data in the topic (or use custom consumer code to process it):
 <p>
 Kafka Streams is a client library of Kafka for real-time stream processing and analyzing data stored in Kafka brokers.
 This quickstart example will demonstrate how to run a streaming application coded in this library. Here is the gist
-of the <code><a href="https://github.com/apache/kafka/blob/{dotVersion}/streams/examples/src/main/java/org/apache/kafka/streams/examples/wordcount/WordCountDemo.java">WordCountDemo</a></code> example code (converted to use Java 8 lambda expressions for easy reading).
+of the <code><a href="https://github.com/apache/kafka/blob/{{dotVersion}}/streams/examples/src/main/java/org/apache/kafka/streams/examples/wordcount/WordCountDemo.java">WordCountDemo</a></code> example code (converted to use Java 8 lambda expressions for easy reading).
 </p>
 <pre>
 // Serializers/deserializers (serde) for String and Long types
@@ -446,4 +446,4 @@ console consumer, as described above).
 
 </script>
 
-<div class="p-quickstart"></div>
+<div class="p-quickstart"></div>