Update camera_sensor.md

Author: dkastl

doc/examples/camera_sensor.md

@@ -52,7 +52,7 @@ curl -iX POST "${BROKER_URL}/v2/entities" \
     "id": "urn:ngsi-ld:SpeedCameraSensor:001",
     "type": "SpeedCameraSensor",
     "image": {
-      "value": "https://images.unsplash.com/photo-1567333188258-99e13c119241%3Fw%3D640",
+      "value": "[https://images.unsplash.com/photo-1567333188258-99e13c119241%3Fw%3D640](https://private-user-images.githubusercontent.com/227762/354205255-bc50ba25-9f69-464d-b899-eb97ab76e0bf.jpg?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3MjI1MTIyMjcsIm5iZiI6MTcyMjUxMTkyNywicGF0aCI6Ii8yMjc3NjIvMzU0MjA1MjU1LWJjNTBiYTI1LTlmNjktNDY0ZC1iODk5LWViOTdhYjc2ZTBiZi5qcGc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjQwODAxJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI0MDgwMVQxMTMyMDdaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT01M2RlZDUxZWU4NTE2MTlmZjZmMTgxOWQxOWU4MWMyMWMwNzlmZGEzYjgzYmVhZjA5N2YzZjg4ZGVhNDUxNDExJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCZhY3Rvcl9pZD0wJmtleV9pZD0wJnJlcG9faWQ9MCJ9.GEF-0OQ_Uk3dwibSJZfU4n3EQiTBAuRDS1gB1hEL1h0)",
       "type": "URL"
     },
     "speed": {