Test: increase integration test timeout for TruffleRuby

Author: st0012

test/integration_test.rb

@@ -359,6 +359,7 @@ def make_request(request, params = nil)
 
   def read_response(request)
     timeout_amount = ENV["CI"] ? 20 : 5
+    timeout_amount *= 6 if RUBY_ENGINE == "truffleruby"
 
     Timeout.timeout(timeout_amount) do
       # Read headers until line breaks