fix: category undefined

Author: noki-maker

site/src/routes/index.tsx

@@ -77,9 +77,9 @@ const PrimitivesTable: Component<{ packages: PackageListItem[] | undefined }> =
       {packages => {
         // group packages by category
         const categories = packages.reduce((acc: Record<string, PackageListItem[]>, pkg) => {
-          const category = acc[pkg.category];
+          const category = acc[pkg.primitive.category];
           if (category) category.push(pkg);
-          else acc[pkg.category] = [pkg];
+          else acc[pkg.primitive.category] = [pkg];
           return acc;
         }, {});