docs: Fixed missing article Update README.MD (#797)

Author: mdqst

superchain/extra/README.MD

@@ -3,5 +3,5 @@
 This is a collection of extra configuration data because not all address and system-config information is available through L1 for some chains.
 
 - [addresses.json](./addresses/addresses.json): L1 Smart Contract addresses for each network.
-- [bytecodes](./bytecodes/): The full bytecode that is factored out of compressed genesis system configuration file. Not designed for human consumption.
+- [bytecodes](./bytecodes/): The full bytecode that is factored out of the compressed genesis system configuration file. Not designed for human consumption.
 - [genesis](./genesis/): Compressed genesis system configuration data. Not designed for human consumption.