add ads tag to listings, title change for listing, some cleanup

_data/metadata.js

@@ -1,6 +1,6 @@
 export default {
 	title: "Fediverse Skillshare Classifieds",
-	description: "Skillshares and more",
-	url: "",
+	description: "Skillshare listings for the Fediverse",
+	url: "https://inherentlee.codeberg.page/fedi-skillshares",
 	author: "Lee Cattarin"
 }