actix-http: v3.19.0

• Fix QualityItem parsing to recognize quality parameters before other parameters and ignore semicolons inside quoted values.
• Parse header quality values as exact decimals and reject invalid numeric syntax.
• Round float quality conversions to the nearest thousandth to preserve all three decimal places.
• Reject WebSocket frames whose 64-bit payload length has the most significant bit set, or whose length does not fit in usize on 32-bit targets, using ws::ProtocolError::Overflow.
• Update zstd dependency to 0.14.
• Update brotli dependency to 9.