refactor: providing this logo in optimized image formats

Both migrated to JPEG which provides better compression as well as WebP

site/src/routes/_components/WhosUsingSvelte.svelte

@@ -47,7 +47,7 @@
 	<a target="_blank" rel="noopener" href="https://beyonk.com"><img src="organisations/beyonk.svg" alt="Beyonk logo"></a>
 	<a target="_blank" rel="noopener" href="https://chess.com" style="background-color: rgb(49,46,43);"><img src="organisations/chess.svg" alt="Chess.com logo"></a>
 	<a target="_blank" rel="noopener" href="https://datawrapper.de"><img src="organisations/datawrapper.svg" alt="Datawrapper logo"></a>
-	<a target="_blank" rel="noopener" href="https://db.nomics.world" style="background-color: rgb(15,39,47);"><img src="organisations/dbnomics.png" alt="DBNomics logo"></a>
+	<a target="_blank" rel="noopener" href="https://db.nomics.world" style="background-color: rgb(15,39,47);"><picture><source type="image/webp" srcset="organisations/dbnomics.webp"><img src="organisations/dbnomics.jpg" alt="DBNomics logo"></picture></a>
 	<a target="_blank" rel="noopener" href="https://from-now-on.com"><img src="organisations/from-now-on.png" alt="From-Now-On logo"></a>
 	<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>