give class to SI17 image, <div class="issue-img-17">

index.html

@@ -45,7 +45,7 @@
 				<a href="17/index.html">
 					<div class="issue-nr">Special<br> Issue 17</div>
 					<div class="issue-date">January/April 2022</div>
-					<div class="issue-img"><img src="img/si17-cover.jpg"></div>
+					<div class="issue-img-17"><img src="img/si17-cover.jpg"></div>
 					<div class="issue-title">This box found you for a reason</div>
 					<div class="issue-text">
                       <p>Dear Player,</p>