fix: search params (#200)

# Description

Edit search params query so that it doesn't pull and show partials in
the search results. These are what are 404'ing.

server/api/search.json.get.ts

@@ -2,6 +2,6 @@ import { serverQueryContent } from '#content/server';
 
 export default eventHandler(async (event) => {
   return serverQueryContent(event)
-    .where({ _type: 'markdown', navigation: { $ne: false } })
+    .where({ _type: 'markdown', _partial: false, navigation: { $ne: false } })
     .find();
 });