Register searchable like this instead

Related: statamic/cms#13247

Author: duncanmcclean

src/ServiceProvider.php

@@ -240,7 +240,7 @@ protected function registerSearchProvider(): self
     {
         SearchProvider::register();
 
-        Search::addContentSearchable(SearchProvider::class);
+        Search::addContentSearchable('runway:*');
 
         return $this;
     }