[guillaume-sainthillier]

Marks the 6.5 CHANGELOG section as released and drops "not released yet" from the troubleshooting guide's upgrade note. Once merged, 6.5.0 gets tagged on 6.x with a GitHub release whose notes are this section.

6.5 contains:

• Upgrade note: 6.5 rejects files that 6.4 accepted: record order and dates are now checked in strict and non-strict mode alike, and throw a ParseException where 6.4 returned wrong data silently.
• Changed: zero-filled and out-of-range dates throw; CFONB 120 and 240 record order is enforced (fix(parser): reject out-of-range dates and stray CFONB 240 records, fix 0-decimal amounts #371, fix(parser): validate the record sequence of CFONB 120 and 240 files, explain zero-filled dates #373).
• Fixed: CFONB 120 amounts with 0 decimals, the missing-header report and zero-filled settlement dates in CFONB 240 (fix(parser): reject out-of-range dates and stray CFONB 240 records, fix 0-decimal amounts #371).
• Added: \r line endings (fix(parser): reject out-of-range dates and stray CFONB 240 records, fix 0-decimal amounts #371).