Fix test

Author: andyw8

test/fixtures/search_index.js

@@ -7,14 +7,15 @@ module RubyLsp
   module Rails
     class HoverTest < ActiveSupport::TestCase
       setup do
+        body = File.read("#{__dir__}/../../test/fixtures/search_index.js")
         stub_request(:get, %r{https://api\.rubyonrails\.org/v.*/js/search_index\.js})
           .with(
             headers: {
               "Host" => "api.rubyonrails.org",
               "User-Agent" => "Ruby",
             },
           )
-          .to_return(status: 200, body: "{}", headers: {})
+          .to_return(status: 200, body: body, headers: {})
 
         # Build the Rails documents index ahead of time
         capture_io do