fix: set default offset of IndexBuffer

[xiaoiver]

🤔 This is a

• New feature
• Bug fix
• Site / Document optimization
• TypeScript definition update
• Refactoring
• Performance improvement
• Code style optimization
• Test Case
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🔗 Related issue link

renderPass.setVertexInput(
  inputLayout,
  [
    {
      buffer: vertexBuffer,
    },
  ],
  {
    buffer: indexBuffer,
    offset: 0, // This should be omitted.
  },
);

💡 Background and solution

📝 Changelog

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