Update default value

fix: #864

web/spec/gen/components/Tabs.ts

@@ -1,7 +1,7 @@
 const Tabs = (id, libraries = [], examples = []) =>
   `
 <Tabs
-  defaultValue="js"
+  defaultValue="${libraries[0].id}"
   groupId="${id}"
   values={[${libraries.map((x) => `{ label: '${x.name}', value: '${x.id}' }`).toString()}]}>