Proposal: Rename white list -> allow list and black list -> deny list

[DanSchaper]

Change blacklist and whitelist terminology

Like the UK NCSC says the terminology of blacklists and whitelists suggests black is associated with 'forbidden' and other negativity. I propose Pi-hole terminology Blacklist and Whitelist is changed to e.g. Denylist and Allowlist or Blocklist and Allowlist.