[msan] Fix goo.gl link in comment for Valgrind paper
goo.gl is going away: https://developers.googleblog.com/en/google-url-shortener-links-will-no-longer-be-available/
Fix goo.gl link from:
- http://goo.gl/QKbem
+ https://static.usenix.org/event/usenix05/tech/general/full_papers/seward/seward_html/usenix2005.html
and reflow the comment a bit to make it look a bit better after the URL change,
although it's not perfect now.
Committed as obvious.
Bug: https://github.com/llvm/llvm-project/issues/99586
