Update content.json

public/content/content.json

@@ -10,7 +10,7 @@
       "project_year_start": "2017",
       "project_year_end": "2021",
       "project_is_on_going": false,
-      "imageLink": "imgs/thumbnails/smartpublicbuilding.png",
+      "imageLink": "/imgs/thumbnails/smartpublicbuilding.png",
       "keywords": ["Smart Buildings", "Smart Home", "Building Management", "IoT", "Open Source"],
       "description_en": "Different IoT applications for smart public buildings based on open-source software and smart home technologies have been developed to explore potentials and pitfalls. The project goals included promoting sustainable building usage, enhancing comfort, and facilitating retrofits in existing buildings via the deployment of wireless smart home technologies.",
       "description_de": "Different IoT applications for smart public buildings based on open-source software and smart home technologies have been developed to explore potentials and pitfalls. The project goals included promoting sustainable building usage, enhancing comfort, and facilitating retrofits in existing buildings via the deployment of wireless smart home technologies."