fix tumblr api example url

hackathon_starter/hackathon/templates/hackathon/api_examples.html

@@ -6,7 +6,7 @@
 	<div class="row text-center">
 	    <div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/githubUser/">Github Example</a></div>
 	    <div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/steam/">Steam Example</a></div>
-	    <div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/">Tumblr Example</a></div>
+	    <div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/tumblr/">Tumblr Example</a></div>
 		<div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/linkedin/">LinkedIn Example</a></div>
 		<div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/twilio/">Twilio Example</a></div>
 		<div class="col-sm-4"><a href="http://127.0.0.1:8000/hackathon/instagram/">Instagram Example</a></div>