Update sponsor link

Author: lovelydinosaur

README.md

@@ -23,7 +23,7 @@ The initial aim is to provide a single full-time position on REST framework.
 <p align="center">
   <a href="http://jobs.rover.com/"><img src="https://raw.githubusercontent.com/tomchristie/django-rest-framework/master/docs/img/premium/rover-readme.png"/></a>
   <a href="https://getsentry.com/welcome/"><img src="https://raw.githubusercontent.com/tomchristie/django-rest-framework/master/docs/img/premium/sentry-readme.png"/></a>
-  <a href="https://getstream.io/?utm_source=drf&utm_medium=banner&utm_campaign=drf"><img src="https://raw.githubusercontent.com/tomchristie/django-rest-framework/master/docs/img/premium/stream-readme.png"/></a>
+  <a href="https://getstream.io/try-the-api/?utm_source=drf&utm_medium=banner&utm_campaign=drf"><img src="https://raw.githubusercontent.com/tomchristie/django-rest-framework/master/docs/img/premium/stream-readme.png"/></a>
   <a href="http://www.machinalis.com/#services"><img src="https://raw.githubusercontent.com/tomchristie/django-rest-framework/master/docs/img/premium/machinalis-readme.png"/></a>
 </p>
 

docs/index.md

@@ -73,7 +73,7 @@ The initial aim is to provide a single full-time position on REST framework.
 <ul class="premium-promo promo">
     <li><a href="http://jobs.rover.com/" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/rover_130x130.png)">Rover.com</a></li>
     <li><a href="https://getsentry.com/welcome/" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/sentry130.png)">Sentry</a></li>
-    <li><a href="https://getstream.io/?utm_source=drf&utm_medium=banner&utm_campaign=drf" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/stream-130.png)">Stream</a></li>
+    <li><a href="https://getstream.io/try-the-api/?utm_source=drf&utm_medium=banner&utm_campaign=drf" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/stream-130.png)">Stream</a></li>
     <li><a href="http://www.machinalis.com/#services" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/Machinalis130.png)">Machinalis</a></li>
 </ul>
 <div style="clear: both; padding-bottom: 20px;"></div>