electron: [Bug]: Renderer spellcheck API does not work on Windows

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Electron Version

12.0.4

What operating system are you using?

Windows

Operating System Version

Windows 10 1909

What arch are you using?

x64

Last Known Working Electron version

None

Expected Behavior

Expecting require('electron').webFrame.isWordMisspelled('testt') to return true.

Actual Behavior

require('electron').webFrame.isWordMisspelled('testt') returns false.

Testcase Gist URL

https://gist.github.com/lishid/53782e6e43f4bc431ac1fed3bff33c85