Add release manifest for 2.1.27 about page candidate

Ariver

2026-06-03 c64b469e5f7830b83db0d0cae29cf38248465efb

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ae26657fcdb0c1c8756b751833a634ddda01197f434418414d17902470dfbcbc  PrivateVoice Input-2.1.18-build20260601.1905-arm64-local.dmg
fb823c183df02f11413d12e4eb58cc04ed281de94936e7994af3e6837c6e1131  PrivateVoice Input-2.1.18-build20260601.1905-x86_64-local.dmg