PLAYA-PDF v0.6.5: Clean up another hasty release

PLAYA 0.6.5: 2025-08-01

• Fix terrible error in xref detection and parsing
• Support 1D and mixed CCITT fax decoding

What's Changed

• Support one-dimensional and mixed CCITT image compression by @dhdaines in #162
• feat: Add finalize() method to ContentObject by @dhdaines in #164

Full Changelog: v0.6.4...v0.6.5