www/chromium: update to 99.0.4844.51
On the port side, this update brings:
- libvulkan enabled by default
- more unit tests enabled
- no longer dependent on Python 2.7
Security: https://vuxml.freebsd.org/freebsd/e0914087-9a09-11ec-9e61-3065ec8fd3ec.html
(cherry picked from commit bfedd5f1f016c174f3fe18cd38c8517ece7b1e9b)