Function sys_silo_rename 

pub fn sys_silo_rename(
    handle: u64,
    label_ptr: u64,
    label_len: u64,
) -> Result<u64, SyscallError>

Sets the strate_label of a silo identified by handle.

Requires silo-admin capability. The label must be non-empty, at most 31 bytes, and contain ONLY ASCII alphanumeric characters, -, _, or ..