fix(curriculum): correct typos in lessons

[GalacticAvenger]

Summary

Fixed a typo in the Introduction to Git and GitHub lecture where "select on owner" should be "select an owner."

File: curriculum/challenges/english/blocks/lecture-introduction-to-git-and-github/68829061f03543726ea6f318.md

Before: "Your next option is to select on owner, you can choose your user account..."
After: "Your next option is to select an owner, you can choose your user account..."

Checklist

• Typo/grammar fix only
• No functional changes

[github-actions]

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[github-actions]

Hi there,

Thanks for opening this pull request.

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