Update Changelog for 0.4.1

[apyrgio]

No description provided.

[deeplow]

Thanks for the changelog. I made some suggestions.

[deeplow]

TGTM. But what do you think about us borrowing some inspiration from https://keepachangelog.com/en/1.0.0/

In specific:

• add approx date to the version
• group things into markdown subheadings instead of everything being prefixed by their category

Example:

## [1.1.1] - 2023-03-05

### Added

- Arabic translation (#444).
- v1.1 French translation.

They also group stuff into these categories, which seems reasonable:

Types of changes:
 -   Added for new features.
 -   Changed for changes in existing functionality.
 -   Deprecated for soon-to-be removed features.
 -   Removed for now removed features.
 -   Fixed for any bug fixes.
 -   Security in case of vulnerabilities.

[apyrgio]

Sorry, just saw this message. Actually, I use the "Keep A Changelog" format in my own projects, but I didn't want to enforce it on Dangerzone. If you like it as well, I can modify the new entry to follow this format.

[apyrgio]

I've updated the PR by changing the format to Keep A Changelog. Take a look!