Git 2.33 isn't the most exciting update in recent times but primarily an assortment of many different bug fixes. In fact, Git 2.33 seems to be primarily a maintenance release with no big shiny new features at this time but just an assortment of fixes and other smaller items.
Git 2.33-rc0 does feature some smaller items like a more optimized "git send-email", test coverage improvements, clean-ups ahead of future changes landing, a guideline for using gender-neutral documentation, and other documentation improvements. Git's new coding guidelines around recommended gender-neutral descriptions can be seen here . Existing documentation was also updated to avoid the use of genders for users or other people.
See the Git 2.33-rc0 announcement on the work pending so far for this next version.