Refactor sentence and fix typo

[noeliufz]

Description

Refactor sentence:
"当我们引入全局可用的print宏在教程03，我门有一点作弊。"
-> "我们在教程03引入全局可用的print!宏时有一点作弊。"

Fix typo:
"我门" typo corrected during sentence refactoring

Related Issue: #166

Pre-commit steps

• Tested on QEMU and real HW Rasperry Pi.
  • Not needed if it is just a README change or similar.
• Ran ./contributor_setup.sh followed by ./devtool ready_for_publish
  • You'll need Ruby with Bundler and NPM installed locally.
  • If no Rust-related files were changed, ./devtool ready_for_publish_no_rust can be used instead (faster).
  • This step is optional, but much appreciated if done.

[BartMassey]

I'm not a Chinese speaker, but it checks out in Google Translate at least.

[BartMassey]

Thanks much for the correction.