quick fix

src/components/data/steckbriefe.ts

 interface Steckbrief{
     vorname: string; 
     nachname: string; 
-    linkedin?: string; 
-    picture: string; 
+    linkedinurl?: string; 
+    pictureurl: string; 
     pronouns: string; 
     studiengang: string; 
     headof?: string; 
@@ -18,8 +18,8 @@ export const teammembers: Array<Steckbrief> = [
     {
         vorname: "Sinan", 
         nachname: "Zimmermann", 
-        linkedin: "string",
-        picture: "string",
+        linkedinurl: "string",
+        pictureurl: "string",
         pronouns: "string", 
         studiengang: "string", 
         igemjob: "string",