[Geany-i18n] Update of dutch translation

[Peter Scholtens]

Hello,

The dutch translation is updated.

A small remark: after inspecting the latest translation source, I
wondered if it would be more clear to write "Smart HOME key" with
capitals, instead of "Smart home key" in the file interface.c:

#: ../src/interface.c:3703
msgid "\"Smart\" home key"

In most cases, the real keyboards will have the word "Home" displayed on
one key, and it is typically not translated.

Best wishes and happy new year!

Peter Scholtens