[openssl/general-policies] 7f0da0: rename policy file

[Pauli]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/general-policies
  Commit: 7f0da0b636eae86511bd770c280b3be167dbf0fd
      https://github.com/openssl/general-policies/commit/7f0da0b636eae86511bd770c280b3be167dbf0fd
  Author: Pauli <pauli at openssl.org>
  Date:   2023-06-29 (Thu, 29 Jun 2023)

  Changed paths:
    R policies/Sponsorship_Policy.md
    A policies/sponsorship-policy.md

  Log Message:
  -----------
  rename policy file