Add Neue Zürcher Zeitung logo (#3073)

site/src/routes/_components/WhosUsingSvelte.svelte

@@ -52,6 +52,7 @@
 	<a target="_blank" rel="noopener" href="https://itslearning.com"><img src="organisations/itslearning.svg" alt="itslearning logo"></a>
 	<a target="_blank" rel="noopener" href="http://mustlab.ru"><img src="organisations/mustlab.png" alt="Mustlab logo"></a>
 	<a target="_blank" rel="noopener" href="https://www.nesta.org.uk"><img src="organisations/nesta.svg" alt="Nesta logo"></a>
+	<a target="_blank" rel="noopener" href="https://www.nzz.ch"><img src="organisations/nzz.svg" alt="Neue Zürcher Zeitung logo"></a>
 	<a target="_blank" rel="noopener" href="https://nytimes.com"><img src="organisations/nyt.svg" alt="The New York Times logo"></a>
 	<a target="_blank" rel="noopener" href="https://openstate.eu"><img src="organisations/open-state-foundation.svg" alt="Open State Foundation logo"></a>
 	<a target="_blank" rel="noopener" href="https://razorpay.com"><img src="organisations/razorpay.svg" alt="Razorpay logo"></a>