**Description of the issue:DoH not working in windows10
How can this issue be reproduced?
1.edit network adapter,set dns to 126.96.36.199 and 188.8.131.52
2.edit brave browser “brave://flags/” set “Secure DNS lookups” to “Enabled”, Restart browser.
3. use Brave access “https://184.108.40.206/help”, The result shows that DoH not working.
DoH works ok in latest Chrome and Microsoft Edge, So I suggest Brave make DoH works ok.Thank you.
Brave Version( check
Version 1.15.75 Chromium: 86.0.4240.99 (Official Build) (64-bit)