Exempi 2.6.6 is out

Exempi 2.6.6 is out.

Here are the changes:

• Cherry-pick patch from Adobe XMP SDK v2025.03
  • Protect from buffer overruns. Fixes:
    • Issue 33
    • GHSL-2024-083
    • GHSL-2024-084
    • GHSL-2024-085
    • GHSL-2024-086
    • GHSL-2024-087