fix: correct grammar and typos in action questions

[NabilMx99]

PR Type

• Adding new question(s)
• Other content changes (updating questions, answers, explanations or study resources)
• Code changes (non-content)
• Documentation changes
• Other

What's new?

This pull request makes minor grammar and typo corrections in two GitHub Actions questions:

• Fixed grammar in the answer choices by changing "a" to "an" before "environment" and "enterprise" in questions/en/actions/question-071.md.
• Removed the duplicate "the" from the answer choices in questions/en/actions/question-158.md.

[Copilot]

Pull request overview

PR fix small grammar/typo in GitHub Actions quiz content. Change keep question meaning same; improve readability for learners.

Changes:

• Fix “a” → “an” before “environment” / “enterprise” in question-071
• Remove duplicate word “the” in answer choices in question-158

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
questions/en/actions/question-071.md	Grammar fix in answer choices (“a” → “an”).
questions/en/actions/question-158.md	Typo fix in answer choices (remove duplicate “the”).