Hello!

Latest version is 89.0.4389.90

ungoogled-chromium upstream has it: 
https://github.com/Eloston/ungoogled-chromium/commit/64cbcbcfee33fd56760173b3a17d2de52cd77258

Debian also upgraded: 
https://salsa.debian.org/chromium-team/chromium/-/commit/8a1f530bdc3fc90993cdc1499e77f9e91468a686

I am not sure how to undertake this upgrade, I tried a little bit but
it failed at failing to delete some bundled third_party directories.

Would love to know in more detail what is the process for upgrading
ungoogled-chromium, license checking and patch rebasing if necessary.

Thank you!