fix: the isLoading property of the useSpeechSynthes hook is not working

[dayuy]

💻 变更类型 | Change Type

• ✨ feat
• 🐛 fix [Bug] the isLoading property of the useSpeechSynthes hook is not working #39
• ♻️ refactor
• 💄 style
• 🔨 chore
• 📝 docs

🔀 变更说明 | Description of Change

📝 补充信息 | Additional Information

[lobehubbot]

👍 @dayuy


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