[maps,tests][xs]: add default export to OpenLayers component

examples/openspending/content/stories/frankfurt-is-investing-in-education-and-your-city-should-too.mdx

@@ -16,6 +16,16 @@ the education slice has grown noticeably over the years, indicating Frankfurt's
 The city's commitment to education is abundantly clear.
 
 <Map data="https://openlayers.org/data/vector/ecoregions.json" />
+
+<OpenLayers
+  layers={[
+    {
+      url: 'https://openlayers.org/data/vector/ecoregions.json',
+      name: 'Teste',
+    },
+  ]}
+/>
+
 <VegaLite
   spec={{
     $schema: 'https://vega.github.io/schema/vega-lite/v5.json',