CHANGELOG: Update for JSON format and console output handling

Signed-off-by: Christophe Guerreiro <christophe.guerreiro@non.se.com>

Author: Christophe Guerreiro

CHANGELOG.md

@@ -15,6 +15,16 @@ boolean options, all defaulting to `True`:
   - `--show-packageconfig` to `--packageconfig`(default) and `--no-packageconfig`
   - `--ignore-proprietary` to `--packages-proprietary`(default) and `--no-packages-proprietary`
 
+- Console output handling has been updated:
+  - **Human-readable** output is now redirected to **stderr**
+  - **Structured JSON** output is emitted on **stdout** to facilitate seamless
+    integration of the tool into automated pipelines and scripting workflows.
+
+- The JSON output file has been updated:
+  - The JSON output file is no longer generated by default.
+  - The `--output <PATH>` option have been renamed to `--json-output <PATH>`
+  - The `--json-output <PATH>` option must now be explicitly specified to enable JSON file generation.
+
 ### Fixed
 
 ### Removed