Replace `bump2version` dependency with `bump-my-version`

[Thom747]

Description

The bump2version Python package we depend on is no longer maintained but has a successor in bump-my-version.
Apart from still receiving updates, this new package also allows for updating a file multiple times, which we need for the CITATION.cff file.

Thus, the following changes should be made:

• Dependency on bump2version is replaced with bump-my-version.
• RELEASE.md is updated to use bump-my-version and no longer has a manual step for updating the time in CITATION.cff.
• The configuration files are updated and now also update the date in CITATION.cff.

Modules to be created

None

Modules to be modified

None

Tests to be created/updated

None

Documentation to be updated

• RELEASE.md

Hardware

None