Add IOTA Foundation logo to `WhoIsUsingSvelte` component

site/src/routes/_components/WhosUsingSvelte.svelte

@@ -63,6 +63,7 @@
 	<a target="_blank" rel="noopener" href="https://godaddy.com"><img src="organisations/godaddy.svg" alt="GoDaddy logo" loading="lazy"></a>
 	<a target="_blank" rel="noopener" href="https://www.grainger.com"><img src="organisations/grainger.svg" alt="Grainger logo" loading="lazy"></a>
 	<a target="_blank" rel="noopener" href="http://healthtree.org/"><img src="organisations/healthtree.png" alt="HealthTree logo" loading="lazy"></a>
+	<a target="_blank" rel="noopener" href="https://iota.org"><img src="organisations/iota.svg" alt="IOTA logo" loading="lazy"></a>
 	<a target="_blank" rel="noopener" href="https://itslearning.com"><img src="organisations/itslearning.svg" alt="itslearning logo" loading="lazy"></a>
 	<a target="_blank" rel="noopener" href="https://jacoux.com"><img src="organisations/jacoux.png" alt="Jacoux logo" loading="lazy"></a>
 	<a target="_blank" rel="noopener" href="https://jingmnt.co.za"><img src="organisations/jingmnt.png" alt="Jingmnt logo" loading="lazy"></a>