[PrivacyBadger] Privacy Badger version 2020.7.21 released

[Alexei]

Privacy Badger 2020.7.21 has been released for all supported browsers.
As always, you can get it from https://privacybadger.org/ or from your
browser's add-on gallery.

Notable updates:

* Improved broken site reporting screen in the popup
* Refreshed the look of options page tabs
* Fixed various site breakages
* Improved translations (Simplified Chinese, Danish, European
Portuguese, Spanish, Turkish)

For further details, consult our release notes on GitHub:
https://github.com/EFForg/privacybadger/releases/tag/release-2020.7.21