Type in German headline

One headline at https://open-elements.com/de/about/ is wrong. It should be "Unsere Kunden & Partner" instead of "Unser Kunden & Partner" (missing "e" at end of first word).


<img width="1456" height="1276" alt="Image" src="https://github.com/user-attachments/assets/951ef75e-b2d0-4317-89c0-4a301547491b" />