Ungoogled-chromium: Updating to Chromium 83.0.4103.97

[Zoraver]

Please respond if you would like to update ungoogled-chromium to the new stable Chromium version.

Notes for the developer

Once you claim it, it is advisable that you create a Draft Pull Request for increased visibility:

Finally, make sure to reference this issue in your PR.

Feel free to ask questions and discuss issues here along the way. Thanks!

Notes for others

Feel free to raise issues or questions throughout the process. However, please refrain from asking ETAs unless no visible progress has been made here or on the developer's PR for a while (e.g. 2 weeks).

[Zoraver]

I am going to work on this; expect a pull request shortly.