security/nss: update to 3.93

Changes: https://groups.google.com/a/mozilla.org/g/dev-tech-crypto/c/aC5r1-9zPWI
Changes: https://hg.mozilla.org/projects/nss/shortlog/NSS_3_93_RTM
Reported by: Repology

(cherry picked from commit 8f1de8029378493af93605c0651cfa7a0e01bb37)