Adding figure

Author: wleuenberger

index.html

@@ -1184,8 +1184,7 @@ <h3 id="GitHubHPCC">GitHub and HPCC Tutorial</h3>
   <section class="title">
     <h1>GitHub and HPCC Tutorial</h1>
     <h1>High performance computing: Using the HPCC, GitHub, and RStudio</h1>
-    <img src="assets/images/GMSD1.JPG" height="133" width="200">
-    <img src="assets/images/GMSD2.JPG" height="133" width="200">
+    <img src="assets/images/HPCC_diagram.jpeg" height="115" width="200">
   </section>
   <section class="content">
     <p>