chore: fix spelling

docs/dev/contracts/README.md

@@ -64,7 +64,7 @@ based on a native Ethereum signature, all wallets, even hardware wallets, will w
 
 ### Deployment
 
-zkSync Era Mainnet is here! To get started visit the [ZKsync Era Documentation](https://docs.zksync.io).
+ZKsync Era Mainnet is here! To get started visit the [ZKsync Era Documentation](https://docs.zksync.io).
 
 ## Zinc
 
@@ -91,7 +91,6 @@ closely follow that of [Rust](https://www.rust-lang.org/).
 The Zinc compiler uses LLVM as its middle-end and back-end, which provides a powerful set of solutions for code
 optimization.
 
-
 ## Getting help
 
 Most questions are answered in our [zkEVM FAQ](/zkevm/README.md) and major concepts are outlined on our