doc: update changelog for contextual refactor

Author: alexisszmundy

CHANGELOG.md

@@ -3,9 +3,10 @@
 ### Added
 - Authorizations for scheduled Perret calls
 - Get questionnaires by review activated or not endpoint
-- Save all edited previous/external files for one questionnaire endpoint
+- Save all contextual previous/external variables files for one questionnaire endpoint
 ### Changed
 - No more 400 if the previous/external file has no corresponding part (warn in log instead)
+- Changed edited to contextual
 
 ## 1.8.6 [2025-09-18]
 ### Added