add urls to sponsors

Author: shimwell

index.md

@@ -17,6 +17,7 @@ The **Open Source Software for Fusion Energy (OSSFE) Conference** is a first-of-
 # Sponsored by
 
 <a href="https://www.mortonlabs.ai/"><img src="assets/morton-labs.webp" alt="morton logo" width="300" /></a>
+&nbsp;
 <a href="https://www.proximafusion.com/"><img src="assets/Logo_Proxima_Fusion.svg" alt="proxima logo" width="200" /></a>
 
 Details on registration can be found on the [registration](registration.md) page.