[BUG] Update NodeInfo supported ink version to '4.2.1'

[ipapandinas]

Description

The ink version (v4.2.1) used in contract templates is higher than than supported ink version (v4.2.0).
The supportedInk value in swankyNode object has to be increased to "v4.2.1".

Steps to Reproduce

1. swanky init test
2. cd test
3. swanky check

Expected vs. Actual Behavior

Expected: No error should be logged.
Actual Behavior: Logs an error.

Environment

• Operating system: Mac M1 darwin
• Project version/tag: @astar-network/swanky-cli/3.1.0 darwin-arm64 node-v18.17.1
• Rust version: rustc 1.72.1
• Rust toolchain: 1.72-aarch64-apple-darwin
• Node version: 18.17.1

Logs, Errors or Screenshots

[ERROR] Version of ink (4.2.1) in flipper is higher than supported ink version (v4.2.0)