fix: removed incorrect ending tag

Author: mfranzke

demo/index.html

@@ -205,7 +205,6 @@ <h2>dynamic images &amp; iframes</h2>
 			</button>
 		</main>
 		<script type="module" src="index.js"></script>
-		></script>
 		<script>
 			if ("serviceWorker" in navigator) {
 				// Differentiate in between the ServiceWorker scripts for the different browser capabilities / support