new string in kinfocenter stable

[Harald Sitter]

FYI, to fix a very rare bug with processor labeling I've introduced a
new string "Unknown Type" to kinfocenter's stable branch. the use case
is **incredibly** rare, so don't worry if you don't get it translated
any time soon.

https://invent.kde.org/plasma/kinfocenter/-/commit/4cfd889c6fe3aa27b8eb99ebc104d4eb2fb39b10

(I've only realized there is a new string after having already cherry
picked, so I hope you'll forgive me for not asking for approval first,
entirely slipped my mind. sorry.)

HS