suggestions part 1

Author: ozgunozerk

content/stellar-contracts/tokens/rwa/rwa.mdx

@@ -46,13 +46,11 @@ graph TB
     end
 
     subgraph "Optional Extensions"
-        DM[Document Manager<br/>ERC-1643]
+        DM[Document Manager]
     end
 
     IDV --> IVS
 
-
-
     subgraph "Identity Stack"
         IVS[Custom Identity Suite]
     end
@@ -510,4 +508,4 @@ When implementing RWA tokens, consider the following security aspects:
 4. **Freezing**: Use freezing mechanisms carefully as they lock user funds
 5. **Recovery**: Recovery operations should have strict authorization and verification
 6. **Pausability**: The pause mechanism should only be accessible to authorized administrators
-7. **Contract Upgrades**: Consider using immutable periphery contracts or implementing upgrade mechanisms carefully
+7. **Contract Upgrades**: Consider following a secure upgrade strategy for your contracts. See: [Contract Upgrades](/stellar-contracts/utils/upgradeable)