Add evmVersion explanations for espace EVM compatibility

[darwintree]

Describe the feature or improvement 描述新特性或改进

The latest supported evm version for Conflux eSpace would not be totally synced with ethereum. Need to show the latest supported evm version for developers. For example, cancun is not supported yet

Optional: Affected page(s) or section(s) 受影响的页面

No response

Optional: Why is this feature or improvement important? 为什么需要这个新特性或改进？

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Optional: Implementation ideas 如何实现

No response

Optional: Additional context 其他上下文信息

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Contribution Confirmation

• I'd be willing to contribute this feature myself within 2 months. 我将在两个月内自己实现这个feature