fix: updated diagram (#455)

# Description
Updating architectural diagram for Prividium to include permissioning
system

Author: yuliyaalexiev

content/10.zk-stack/35.prividium/05.architecture.md

@@ -43,7 +43,7 @@ These components work together to provide secure, verifiable, and customizable n
   A self-hosted explorer with access restrictions aligned to user roles.
   It allows authorized participants to view transactions, blocks, and state data while protecting sensitive information from public exposure.
 
-- [**Validium Chain**](/zk-stack/customizations/validium):
+- [**ZKsync Chain**](/zk-stack/customizations/validium):
   A private ZKsync Chain deployed within your infrastructure.
   It includes a dedicated sequencer and prover that execute transactions and generate zero-knowledge proofs locally.