Links point to proprod HAL

I believe there is an issue with the url of the publications (at least in the widget). Links point to preprod HAL urls, like https://halv3-preprod.archives-ouvertes.fr/hal-00863901 (with ugly preprod background) instead of the regular https://hal.archives-ouvertes.fr/hal-00863901

https://wordpress.org/plugins/hal/