fix keyword

public/content/content.json

@@ -58,7 +58,7 @@
       "project_year_end": "",
       "project_is_on_going": true,
       "imageLink":"imgs/thumbnails/covidSta.jpg",
-      "keywords":["SensorThings API","COVID-19", "Urban Analytics"],
+      "keywords":["SensorThings API","COVID-19", "Urban Analytics","Sensor"],
       "description_en":"The COVID-STA is the OGC SensorThings API data server which provides an open standard-based and geospatial-enabled framework to interconnect the COVID-19 statistics and applications over the web.",
       "description_de":"Der COVID-STA ist der OGC SensorThings API-Datenserver, der ein auf offenen Standards basierendes und raumbezogenes Framework zur Verfügung stellt, um die COVID-19-Statistiken und Anwendungen über das Web miteinander zu verbinden."
     },
@@ -82,7 +82,7 @@
       "project_year_end": "2021",
       "project_is_on_going": false,
       "imageLink":"imgs/thumbnails/3DEbike.gif",
-      "keywords":["SensorThings API","CityGML","GIS Analyst","3D GIS","GIS Analyst", "Urban Analytics"],
+      "keywords":["SensorThings API","CityGML","GIS Analyst","3D GIS","GIS Analyst", "Urban Analytics", "Sensor"],
       "description_en":"The 3D E-bike Tracking is a 3D web-based visual analytics application designed showing various parameters from sensor systems equipped on the E-bike sharing system in the study area of a city of Stuttgart, Germany.",
       "description_de":"Das 3D E-bike Tracking ist eine 3D Webanwendung zu visuellen Analyse und ist designed um verschiedene Parameter von Sensor Systemen zu zeigen. Die Sensoren sind am E-bike Sharing Systemes der Stadt Stuttgart (Deutschland) installiert."
     },
@@ -393,7 +393,7 @@
     "project_year_end": "2021",
     "project_is_on_going": false,
     "imageLink":"imgs/thumbnails/icity_tp31_energy_dashboard.png",
-    "keywords":["Sensors", "Energy", "SensorThings API"],
+    "keywords":["Sensor", "Energy", "SensorThings API"],
     "description_en":"This tool is used for the continuous monitoring and optimization of energy flows within the Robert Bosch GmbH property at Schwieberdingen. This is achieved by allowing users to interact with historical observations from a variety of energy-related sensors.",
     "description_de":"Dieses Tool wird für die kontinuierliche Überwachung und Optimierung der Energieflüsse innerhalb der Liegenschaft der Robert Bosch GmbH in Schwieberdingen eingesetzt. Dies wird dadurch erreicht, dass die Benutzer mit historischen Messwerten von einer Vielzahl von energiebezogenen Sensoren interagieren können."
   },