[MozillaCACerts_jll] Update to v2023-12-12 (#53466)
Memo to self:
* update the version in `stdlib/MozillaCACerts_jll/Project.toml`
* update `MOZILLA_CACERT_VERSION` in `deps/libgit2.version`
* generate new checksums with `make -f contrib/refresh_checksums.mk
mozillacert`
* manually delete old checksums in
`deps/checksums/cacert-<OLD-VERSIONS>`
