fix(content): exclude YAML navigation files from the sitemap (#423)

* fix(content): remove .navigation pages

* Update module.ts

Author: maximepvrt

src/module.ts

@@ -378,6 +378,9 @@ declare module 'vue-router' {
           updatedAt?: string
         }
         nuxtV3Collections.add(ctx.collection.name)
+        if (ctx.file.path.endsWith('/.navigation')) {
+          return
+        }
         if (!('sitemap' in ctx.collection.fields)) {
           return
         }