add SlingTV and Workiva case studies (#9769)

* add SlingTV and Workiva case studies

* update

* updates

* update

content/en/_index.html

@@ -121,6 +121,14 @@ cid: home
     <main>
         <h3>Case Studies</h3>
         <div id="caseStudiesWrapper">
+          <div>
+              <p>Sling TV: Marrying Kubernetes and AI to Enable Proper Web Scale</p>
+              <a href="/case-studies/slingtv">Read more</a>
+          </div>
+          <div>
+              <p>Using OpenTracing to Help Pinpoint the Bottlenecks</p>
+              <a href="/case-studies/workiva">Read more</a>
+          </div>
           <div>
               <p>Pinning Its Past, Present, and Future on Cloud Native</p>
               <a href="/case-studies/pinterest">Read more</a>
@@ -129,15 +137,6 @@ cid: home
               <p>Reinventing the World’s Largest Education Company With Kubernetes</p>
               <a href="/case-studies/pearson">Read more</a>
           </div>
-         
-          <div>
-              <p>Supporting Fast Decisioning Applications with Kubernetes</p>
-              <a href="/case-studies/capital-one">Read more</a>
-          </div>
-          <div>
-              <p>Driving Banking Innovation with Cloud Native</p>
-              <a href="/case-studies/ing">Read more</a>
-          </div>
         
         </div>