Fix the last unit test

Author: ly0va

core/lib/protobuf_config/src/contracts.rs

@@ -87,7 +87,7 @@ impl ProtoRepr for proto::Contracts {
                 validator_timelock_addr: Some(format!("{:?}", this.validator_timelock_addr)),
                 default_upgrade_addr: Some(format!("{:?}", this.default_upgrade_addr)),
                 multicall3_addr: Some(format!("{:?}", this.l1_multicall3_addr)),
-                base_token_addr: Some(format!("{:?}", this.base_token_addr)),
+                base_token_addr: this.base_token_addr.map(|a| format!("{:?}", a)),
             }),
             l2: Some(proto::L2 {
                 testnet_paymaster_addr: this.l2_testnet_paymaster_addr.map(|a| format!("{:?}", a)),