Replace PNG code sample with SVG (#382)

Replace the first SYCL sample code in a PNG file
with an SVG version that can be rendered as just
text instead of a raster image.

Author: rafbiels

Lesson_Materials/Fast_Track/index.html

@@ -87,9 +87,7 @@
 					<div class="container" data-markdown>
 						A first example of SYCL code.
 					</div>
-					<div class="container" data-markdown>
-						![SYCL](../common-revealjs/images/sycl_first_sample_code.png "SYCL")
-					</div>
+					<object class="r-stretch" data="../common-revealjs/images/sycl_first_sample_code.svg"></object>
 				</section>
 				<!--Slide 5-->
 				<section>

Lesson_Materials/What_is_SYCL/index.html

@@ -87,9 +87,7 @@
 					<div class="container" data-markdown>
 						A first example of SYCL code. Elements will be explained in coming sections!
 					</div>
-					<div class="container" data-markdown>
-						![SYCL](../common-revealjs/images/sycl_first_sample_code.png "SYCL")
-					</div>
+					<object class="r-stretch" data="../common-revealjs/images/sycl_first_sample_code.svg"></object>
 				</section>
 				<!--Slide 4A-->
 				<section data-markdown>