add RPC

Author: MoMannn

.env.example

@@ -62,4 +62,4 @@ INK_SEPOLIA_RPC_URL=https://rpc-gel-sepolia.inkonchain.com
 SONIC_TESTNET_RPC_URL=https://rpc.testnet.soniclabs.com
 HOODI_RPC_URL=https://hoodi.infura.io/v3/${RPC_API_KEY}
 RONIN_SAIGON_RPC_URL=https://saigon-testnet.roninchain.com/rpc
-CELO_SEPOLIA_URL=https://rpc.ankr.com/celo_sepolia
+CELO_SEPOLIA_RPC_URL=https://rpc.ankr.com/celo_sepolia