Update team.json with research topics

public/content/team.json

@@ -118,7 +118,7 @@
         "jobTitle_en": "Researcher",
         "imgUrl": "https://www.hft-stuttgart.de/fileadmin/Dateien/Profilbilder/_processed_/9/6/csm_passbild_8f16c0f011.png",
         "profile_link": "https://www.hft-stuttgart.de/p/Matthias-Betz",
-        "researchTopics": ""
+        "researchTopics": "3D City Model | CityGML | Quality Validation | Big Data"
     },
     {
         "firstName": "Simone",