fix: update Klaus Mintel's job title to Geschäftsführer

messages/en.json

@@ -122,7 +122,7 @@
       "quote": "Sometimes all it takes is a clear head and a good cable to make the world a little better.",
       "description": "Klaus is the man with the experience, bringing perspective and calm to the table—even when cable chaos threatens to take over. With impressive industry knowledge and a network as solid as our cables, he ensures everything runs smoothly. Klaus isn’t just a problem solver; he’s a strategic thinker who knows how to get to the point with a touch of humor.",
       "linkedin": "Check Klaus' LinkedIn",
-      "role": "Founder & Visionary"
+      "role": "Managing Director"
     },
     "manifesto": {
       "title": "Our manifesto",