Update merge_request_license_widget_spec.rb reload page

What does this MR do and why?

Describe in detail what your merge request does and why.

Potential fix for #385188 (closed)

There is an issue that the MR License widget may not appear immediately, but it does when the page is reloaded, see #390864 (closed)

This MR adds a page reload

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Screenshot shows no MR widget

Running test locally shows an MR widget when reloaded

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

CHROME_HEADLESS=false bundle exec bin/qa Test::Instance::All http://gdk.test:3000/ ./qa/specs/features/ee/browser_ui/13_secure/merge_request_license_widget_spec.rb

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.