Fix the translation template version number (5->6)
The suffix in this case could be dropped altogether as this file was and is part of Gear (kio-extras in KF5 and konqueror in KF6), but let's keep it.
The suffix in this case could be dropped altogether as this file was and is part of Gear (kio-extras in KF5 and konqueror in KF6), but let's keep it.