Update user handle

Author: Hein

tutorials/code-changes/supabase-connector-performance.mdx

@@ -6,7 +6,7 @@ description: "In this tutorial we will show you how to improve the performance o
 <AccordionGroup>
     <Accordion title="Sequential Merge Strategy">
         <Note>
-            Shoutout to Christoffer Årstrand for the original implementation of this optimization.
+            Shoutout to @christoffer_configura for the original implementation of this optimization.
         </Note>
         ```typescript {7-8, 11, 13-15, 17, 19-20, 24-36, 39, 43-56, 59-60, 75}
         async uploadData(database: AbstractPowerSyncDatabase): Promise<void> {