Update old changelog for v1.0.5

It seems quite a few important changes had not been mentioned.

Author: mhxion

CHANGELOG.md

@@ -7,14 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [1.0.5] - 2023-12-07
 
+### Added
+
+- elAPI can be run without error when run with no arguments. I.e., running elapi will show the default help message.
+- New `version` command.
+- Formatter APIs (including base API `BaseFormat`) now supports multiple conventional names for formats. E.g., `yaml` and `yml` conventions for `YAMLFormat`.
+
 ### Fixed
 
 - Fix timeout issue ([#7](https://gitlab.urz.uni-heidelberg.de/urz-elabftw/elapi/-/issues/7))
 
-### Added
+### Changed
 
-- elAPI can be run without error when run with no arguments. I.e., running elapi will show the default help message.
-- New `version` command.
+- Change default export file extension from `.yaml` to `.yml` to align with eLabFTW convention
+- Change `generate-invoice`'s default `bill-teams` information format from `YAML` to `JSON`
 
 ## [1.0.2] - 2023-11-16