🔖 Update CHANGELOG.md for fast-check@4.9.0, @fast-check/packaged@0.7.1 (#7124)

Resulting CHANGELOG at:
-
https://github.com/dubzzz/fast-check/blob/changelog-fd6d60aa60afb8/packages/fast-check/CHANGELOG.md
-
https://github.com/dubzzz/fast-check/blob/changelog-fd6d60aa60afb8/packages/packaged/CHANGELOG.md

Got the following errors:
- ⚠️ Unhandled type: ⚡ on
[PR-7019](#7019) with title
Speed up `ArrayArbitrary` generate hot path
- ⚠️ Unhandled type: ⚡ on
[PR-7023](#7023) with title
Drop unneeded array allocation in `.map` generate
- ⚠️ Unhandled type: ⚡ on
[PR-7018](#7018) with title
Speed up `TupleArbitrary` generate hot path
- ℹ️ Scanned 276 PRs for @fast-check/packaged:
- ℹ️ • accepted: 0,
- ℹ️ • skipped ignored: 0,
- ℹ️ • skipped unrelated: 276,
- ℹ️ • failed: 0

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Nicolas DUBIEN <github@dubien.org>
Co-authored-by: Claude <noreply@anthropic.com>

Author: 3 people