www/tor-browser: Update 15.0.1 => 15.0.3
Release Notes:
https://blog.torproject.org/new-release-tor-browser-1502/
https://blog.torproject.org/new-release-tor-browser-1503/
PR: 291518
MFH: 2025Q4
(cherry picked from commit 011dbac79a20e3d0024bc02195c86017c9dedd0b)