chore: merge back CHANGELOG changes from 1.8 branch (#9834)

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Change Log
 
+## [1.8.4] - 2024-10-14
+
+### Added
+
+- **Add official support for Python 3.13** ([#9523](https://github.com/python-poetry/poetry/pull/9523)).
+
+### Changed
+
+- Require `virtualenv>=20.26.6` to mitigate potential command injection when running `poetry shell` in untrusted projects ([#9757](https://github.com/python-poetry/poetry/pull/9757)).
+
+### poetry-core ([`1.9.1`](https://github.com/python-poetry/poetry-core/releases/tag/1.9.1))
+
+- Add `3.13` to the list of available Python versions ([#747](https://github.com/python-poetry/poetry-core/pull/747)).
 
 ## [1.8.3] - 2024-05-08