ICU 74 modified the license as a symlink which inevitable points to nothing. Fix is to update license so its not a symlink. The update script will also just point directly to the license instead of the symlink.

Change-Id: I942fec36ad6dc5c1878a47411e855aeb16794b16
Bug: 331443177
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/5397901


Reviewed-by: Shu-yu Guo <syg@chromium.org>