Add new chain configuration for base.blockscout.com

Author: nikitosing

pro-api/prod/chains-config.json

@@ -53,7 +53,8 @@
   "7000": "https://zetascan.com",
   "7001": "https://testnet.zetascan.com",
   "8021": "https://numine.blockscout.com",
-  "8408": "https://zentrace.io",  
+  "8408": "https://zentrace.io",
+  "8453": "https://base.blockscout.com/",
   "8822": "https://explorer.evm.iota.org",
   "10200": "https://gnosis-chiado.blockscout.com",
   "11011": "https://sepolia.shapescan.xyz",