Changelog for ppad-bech32-0.2.3

# Changelog - 0.2.3 (2025-06-21) * Minor performance improvements and internal housekeeping. - 0.2.2 (2025-02-28) * Various optimizations, including roughly 2x faster decoding performance. - 0.2.1 (2025-01-07) * Removes the 'primitive' dependency. - 0.2.0 (2025-01-04) * Adds bech32/bech32m/base32 decoding. * Fixes a bug in which mixed-case HRP's would result in encodings with invalid checksums (IIRC this also affects the Haskell reference implementation). - 0.1.2 (2024-12-15) * Minor performance improvements. - 0.1.1 (2024-12-14) * Simply improves generated Haddocks. - 0.1.0 (2024-12-14) * Initial release, supporting encoding and checksum verification for bech32 and bech32m.