AlwaysOn Shared network location change requrest
The shared network location in that wizard is only used in the wizard and only used as a temporary location to backup the databases to and restore from that location to any of the replicas that could host that database.

Apart from that, it has no use and is not used internally anywhere in availability groups.

You can easily change the value to whatever new value your storage team has given you, but you'll want to double check that all of the replicas have access to said shared location.