DEV: Increase http timeouts in bin/qunit (#36260)

In slower CI environments, it seems that 2s is too short for this check

bin/qunit

@@ -337,8 +337,8 @@ class QunitRunner
   def check_server(port, name)
     uri = URI("http://localhost:#{port}")
     http = Net::HTTP.new(uri.host, uri.port)
-    http.open_timeout = 2
-    http.read_timeout = 2
+    http.open_timeout = 5
+    http.read_timeout = 5
 
     begin
       response = http.get("/")