Add webapp1.internal.s.o to the redirect_uri list

So the link to authenticate in that webapp instance is able to connect the
user in keycloak as well. It will be more practical when one uses that
instance to check things.

data/common/common.yaml

@@ -3915,6 +3915,7 @@ keycloak::resources::realms:
             - https://archive.softwareheritage.org/*
             - https://base.softwareheritage.org/*
             - https://archive.internal.softwareheritage.org/*
+            - https://webapp1.internal.softwareheritage.org/*
           roles: "%{alias('keycloak::resources::clients::swh_web::roles')}"
         protocol_mappers:
           - "%{alias('keycloak::resources::protocol_mappers::audience')}"