docs: add line breaks to hero subtitle

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: JasonXuDeveloper - 傑 <jason@xgamedev.net>

Author: JasonXuDeveloper

README.md

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 **Ship game updates without shipping a build.**
 
-Runtime hot updates for all platforms — push code, assets, and logic without rebuilding.
-Powered by HybridCLR with built-in encryption and obfuscation.
+Runtime hot updates for all platforms — push code, assets, and logic without rebuilding.<br>
+Powered by HybridCLR with built-in encryption and obfuscation.<br>
 1,000+ games shipped · 100+ companies in production · built-in Claude Code AI integration.
 
 [![Version](https://img.shields.io/github/v/release/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine/releases) [![Tests](https://github.com/JasonXuDeveloper/JEngine/actions/workflows/pr-tests.yml/badge.svg)](https://github.com/JasonXuDeveloper/JEngine/actions/workflows/pr-tests.yml) [![License](https://img.shields.io/github/license/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine/blob/master/LICENSE) [![Last Commit](https://img.shields.io/github/last-commit/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine/commits) [![Top Language](https://img.shields.io/github/languages/top/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine) [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FJasonXuDeveloper%2FJEngine.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2FJasonXuDeveloper%2FJEngine) [![CodeFactor](https://www.codefactor.io/repository/github/jasonxudeveloper/jengine/badge)](https://www.codefactor.io/repository/github/jasonxudeveloper/jengine) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/JasonXuDeveloper/JEngine/badge)](https://securityscorecards.dev/viewer/?uri=github.com/JasonXuDeveloper/JEngine) [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/11830/badge)](https://www.bestpractices.dev/projects/11830) [![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/JasonXuDeveloper/JEngine)

README_zh_cn.md

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 **线上热更，即时生效。**
 
-全平台运行时热更新——无需重新打包，即可推送代码、资源和逻辑。
-基于 HybridCLR，内置加密与混淆。
+全平台运行时热更新——无需重新打包，即可推送代码、资源和逻辑。<br>
+基于 HybridCLR，内置加密与混淆。<br>
 累计 1,000+ 款游戏上线 · 100+ 家企业生产环境验证 · 内置 Claude Code AI 工作流。
 
 [![Version](https://img.shields.io/github/v/release/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine/releases) [![Tests](https://github.com/JasonXuDeveloper/JEngine/actions/workflows/pr-tests.yml/badge.svg)](https://github.com/JasonXuDeveloper/JEngine/actions/workflows/pr-tests.yml) [![License](https://img.shields.io/github/license/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine/blob/master/LICENSE) [![Last Commit](https://img.shields.io/github/last-commit/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine/commits) [![Top Language](https://img.shields.io/github/languages/top/JasonXuDeveloper/JEngine)](https://github.com/JasonXuDeveloper/JEngine) [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2FJasonXuDeveloper%2FJEngine.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2FJasonXuDeveloper%2FJEngine) [![CodeFactor](https://www.codefactor.io/repository/github/jasonxudeveloper/jengine/badge)](https://www.codefactor.io/repository/github/jasonxudeveloper/jengine) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/JasonXuDeveloper/JEngine/badge)](https://securityscorecards.dev/viewer/?uri=github.com/JasonXuDeveloper/JEngine) [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/11830/badge)](https://www.bestpractices.dev/projects/11830) [![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/JasonXuDeveloper/JEngine)