Fix group points retrieval in GroupTable component to ensure correct mapping of event groups

src/components/GroupTable.svelte

@@ -35,7 +35,7 @@
     } = $props();
 
     let teamPoints = $derived(
-        Object.entries(event.groups[group]?.points ?? {}).map(([teamId, points]) => ({
+        Object.entries(event.groups.find((g) => g.id === group)?.points ?? {}).map(([teamId, points]) => ({
             team: event.teams.find((t) => t.id === Number(teamId))!!,
             points: points,
         }))