security/nss: update to 3.108
Release Notes (very soon):
https://firefox-source-docs.mozilla.org/security/nss/releases/index.html
Announcement:
https://groups.google.com/a/mozilla.org/g/dev-tech-crypto/c/EOiJTUdpzuo
(cherry picked from commit 0518b6a67edbac02405c7c2f9a65a5d6cc72970a)