Add a UMass logo to the Data Parallelism presentation. (#399)

Author: krasznaa

Lesson_Materials/Data_Parallelism/index.html

@@ -47,7 +47,7 @@
 			<div class="slides">
 				<div id="global-images" class="global-images">
 					<img src="../common-revealjs/images/sycl_academy.png" />
-					<img src="../common-revealjs/images/sycl_logo.png" />
+					<img src="sycl_umass_logo.png" />
 					<div class="trademarks">SYCL and the SYCL logo are trademarks of the Khronos Group Inc.</div>
 				</div>
 				<!--Slide 1-->