Update vendor/libarchive to libarchive/libarchive@6c3301111

Bugfixes:

PR #1549: archive_digest: check return value of EVP_DigestInit()
  - Improves OpenSSL 3.0 support

Obtained from: libarchive
Libarchive commit: 6c3301111caa75c76e1b2acb1afb2d71341932ef
Libarcive tag: v3.6.1