Log Message:
octave: updated to 9.4.0

Summary of bugs fixed for version 9.4.0 (2025-02-05):

Improvements and fixes
- Fix error in calculation of file timestamp on Windows.

GUI
- Update Spanish translation file.
- Update Brazilian Portuguese translation file.

Build system / Tests
- `cellfun`: Add test for function failing to return requested output
- `arrayfun`:  Add test for function failing to return requested output

Documentation
- Clarify default editor difference between CLI and GUI.