docs: changelog

Signed-off-by: Guilhem Barthés <[email protected]>

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Nightly is now done on `owkin/substra-ci` repository ([#304](https://github.com/Substra/substra-tests/pull/304))
 - Parallelism in SDK tests in deactivated until we fix the parallel compute plans issues ([#306](https://github.com/Substra/substra-tests/pull/306))
 - A bunch of SDK tests are skipped due to regressions following the decoupled builder merge ([#306](https://github.com/Substra/substra-tests/pull/306))
+- - BREAKING: replace `todo_count` and `waiting_cont` by the new counts following the new statuses in the backend ([#319](https://github.com/Substra/substra-tests/pull/319))
 
 ## [0.47.0] - 2023-10-18