Update Badges

Author: jason-fox

README.ja.md

@@ -1,7 +1,7 @@
 [![FIWARE Banner](https://fiware.github.io/tutorials.Short-Term-History/img/fiware.png)](https://www.fiware.org/developers)
 [![NGSI v2](https://img.shields.io/badge/NGSI-v2-5dc0cf.svg)](https://fiware-ges.github.io/orion/api/v2/stable/)
 
-[![FIWARE Core Context Management](https://nexus.lab.fiware.org/repository/raw/public/badges/chapters/core.svg)](https://github.com/FIWARE/catalogue/blob/master/core/README.md)
+[![FIWARE Core Context Management](https://fiware.github.io/catalogue/badges/chapters/core.svg)](https://github.com/FIWARE/catalogue/blob/master/core/README.md)
 [![License: MIT](https://img.shields.io/github/license/fiware/tutorials.Short-Term-History.svg)](https://opensource.org/licenses/MIT)
 [![NGSI v1](https://img.shields.io/badge/NGSI-v1-ff69b4.svg)](http://forge.fiware.org/docman/view.php/7/3213/FI-WARE_NGSI_RESTful_binding_v1.0.zip)
 [![Support badge](https://img.shields.io/badge/tag-fiware-orange.svg?logo=stackoverflow)](https://stackoverflow.com/questions/tagged/fiware)

README.md

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 ## Short Term History
 
-[![FIWARE Core Context Management](https://nexus.lab.fiware.org/repository/raw/public/badges/chapters/core.svg)](https://github.com/FIWARE/catalogue/blob/master/core/README.md)
+[![FIWARE Core Context Management](https://fiware.github.io/catalogue/badges/chapters/core.svg)](https://github.com/FIWARE/catalogue/blob/master/core/README.md)
 [![License: MIT](https://img.shields.io/github/license/fiware/tutorials.Short-Term-History.svg)](https://opensource.org/licenses/MIT)
 [![NGSI v1](https://img.shields.io/badge/NGSI-v1-ff69b4.svg)](http://forge.fiware.org/docman/view.php/7/3213/FI-WARE_NGSI_RESTful_binding_v1.0.zip)
 [![Support badge](https://img.shields.io/badge/tag-fiware-orange.svg?logo=stackoverflow)](https://stackoverflow.com/questions/tagged/fiware)