MINOR: Adding See how Kafka Streams is being used section to Streams page

Author: manjuapu <manjula@confluent.io>
Author: Manjula K <manjula@kafka-summit.org>

Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>

Closes #3914 from manjuapu/customer-logo-stream

docs/streams/index.html

@@ -201,8 +201,24 @@
             </pre>
         </div>
     </div>
-
-    
+    <h3 class="customer-title">See how Kafka Streams is being used</h3>
+    <div class="customer__cards">
+         <div class="customer__card">
+             <div class="customer__card__icon">
+                 <img src="/{{version}}/images/icons/rabobank.png">
+             </div>  
+             <span class="customer__card__label">Rabobank is one of the 3 largest banks in the Netherlands. Its digital nervous system, the Business Event Bus, is powered by Apache Kafka and Kafka Streams.
+             </span>
+             <a href="https://www.confluent.io/blog/real-time-financial-alerts-rabobank-apache-kafkas-streams-api/">Learn More</a>
+         </div>
+         <div class="customer__card customer-right" >
+              <div class="customer__card__icon" >
+                 <img src="/{{version}}/images/icons/zalando.png">
+              </div>  
+              <span class="customer__card__label">As the leading online fashion retailer in Europe, Zalando uses Kafka as an ESB (Enterprise Service Bus), which helps us in transitioning from a monolithic to a micro services architecture. Using Kafka for processing event streams enables our technical team to do near-real time business intelligence.</span>
+              <a href="https://kafka-summit.org/sessions/using-kstreams-ktables-calculate-real-time-domain-rankings/">Learn More</a>
+         </div>
+     </div>
 
     <div class="pagination">
         <a href="#" class="pagination__btn pagination__btn__prev pagination__btn--disabled">Previous</a>