update index.js

src/views/content/index.js

@@ -2,6 +2,6 @@ export { default as ProjectionContent } from "./Projections.mdx";
 export { default as ScaleContent } from "./Scale.mdx";
 export { default as SpatialDataContent } from "./SpatialData.mdx";
 export { default as VisualEncodingContent } from "./VisualEncoding.mdx";
-export { default as MapTypesContent } from "./MapTypes.mdx";
 export { default as ClassificationContent } from "./Classification.mdx";
+export { default as MapTypesContent } from "./MapTypes.mdx";
 export { default as SpatialStatisticsContent } from "./SpatialStatistics.mdx";