point to v6 docs

Author: brunopgalvao

develop/smart-contracts/overview.md

@@ -65,7 +65,7 @@ Beyond Polkadot Hub's native PolkaVM support, the ecosystem offers two main alte
 
 - **EVM-compatible parachains**: Provide access to Ethereum's extensive developer ecosystem, smart contract portability, and established tooling like Hardhat, Remix, Foundry, and OpenZeppelin. The main options include Moonbeam (the first full Ethereum-compatible parachain serving as an interoperability hub), Astar (featuring dual VM support for both EVM and WebAssembly contracts), and Acala (DeFi-focused with enhanced Acala EVM+ offering advanced DeFi primitives).
 
-- **Rust (ink!)**: ink! is a Rust-based framework that can compile down to Wasm or PolkaVM. It uses [`#[ink(...)]`](https://use.ink/docs/v5/macros-attributes/){target=\_blank} attribute macros to create Polkadot SDK-compatible PolkaVM bytecode, offering strong memory safety from Rust, an advanced type system, high-performance PolkaVM execution, and platform independence with sandboxed security.
+- **Rust (ink!)**: ink! is a Rust-based framework that can compile down to Wasm or PolkaVM. It uses [`#[ink(...)]`](https://use.ink/docs/v6/macros-attributes/){target=\_blank} attribute macros to create Polkadot SDK-compatible PolkaVM bytecode, offering strong memory safety from Rust, an advanced type system, high-performance PolkaVM execution, and platform independence with sandboxed security.
 
 
 Each environment provides unique advantages based on developer preferences and application requirements.