Bump Erlang/OTP to 27.3.4.12#173
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OTP 27.2 rejects the new Let's Encrypt "Gen Y" certificate chain served by hex.pm with a TLS key_usage_mismatch error, due to an over-strict extended key usage check on intermediate CA certs. The fix shipped in OTP 27.2.2 (public_key OTP-19240, GH-9208); 27.3 is the latest multi-arch base image tag carrying it. Bump the Debian base date to match.
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OTP 27.2 rejects the new Let's Encrypt "Gen Y" certificate chain served by hex.pm with a TLS
key_usage_mismatcherror, caused by an over-strict extended-key-usage check on intermediate CA certificates. The fix shipped in OTP 27.2.2 (public_keyOTP-19240, GH-9208); 27.3.4.12 is the latest 27.x patch.Verified empirically: a
verify_peerTLS handshake tohex.pm:443from the exacthexpm/elixir:1.18.1-erlang-27.2-...image fails withunsupported_certificate / key_usage_mismatch, while27.3.4.12succeeds.The Debian base date is bumped to
bookworm-20260518to match an available image tag for the new OTP patch.