MINOR: Fixed introduction doc - wrong streams api link

Author: Jakub Dziworski <jakub.dziworski@gmail.com>

Reviewers: Guozhang Wang <wangguoz@gmail.com>, Jason Gustafson <jason@confluent.io>

Closes #1996 from JakubDziworski/doc_fix_streams_link

(cherry picked from commit 7a5133d5545fbffa5bea89818a5b6b3e2175e418)
Signed-off-by: Jason Gustafson <jason@confluent.io>
diff --git a/docs/introduction.html b/docs/introduction.html
index fb05f68..3f03fc1 100644
--- a/docs/introduction.html
+++ b/docs/introduction.html
@@ -146,7 +146,7 @@
 <p>
 For example a retail application might take in input streams of sales and shipments, and output a stream of reorders and price adjustments computed off this data.
 <p>
-It is possible to do simple processing directly using the producer and consumer APIs. However for more complex transformations Kafka provides a fully integrated <a href="/streams.html">Streams API</a>. This allows building applications that do non-trivial processing that compute aggregations off of streams or join streams together.
+It is possible to do simple processing directly using the producer and consumer APIs. However for more complex transformations Kafka provides a fully integrated <a href="/documentation.html#streams">Streams API</a>. This allows building applications that do non-trivial processing that compute aggregations off of streams or join streams together.
 <p>
 This facility helps solve the hard problems this type of application faces: handling out-of-order data, reprocessing input as code changes, performing stateful computations, etc.
 <p>