In the description of the `v8_use_snapshot` gn arg, we had a link to
the old location of our blog.

R=mathias@chromium.org

No-Try: true
Change-Id: Ib7d0ae21f3e109b4fae9ca51a1c69d07d42f9017
Reviewed-on: https://chromium-review.googlesource.com/c/1392191Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58493}