Fix link formatting in README.md

[ales1sobol]

https://rs.school/docs/en/git-convention was not working

Title of Pull Request

🤔 This is a

• 🌟 New task
• 🌐 New module
• ⚙️ Update to an existing task
• 🔧 Update to an existing module
• 🔗 Update or addition of external resources or links
• 🐛 Fix in a task or related content
• 🛠 Fix in a module or related content
• ✏️ Fixed a typo or grammatical error
• [1] 🔗 Fixed a broken link
• ❓ Other (specify: ****____****)

Description

• Brief Overview:
  Need to delete /en/ in link
• Implementation Approach:

Additional Information

• Screenshots/Links:
• Related Issues:

Checklist

• [1] ✅ I have performed a self-review of my own code.
• 📝 I have commented my code, particularly in hard-to-understand areas.
• 🔧 I have made corresponding changes to the documentation (if applicable).
• 🚫 My changes generate no new warnings or errors.

[pavelhalanin]

This URL returns HTTP status 404:
https://rs.school/docs/en/git-convention

I found pages that return HTTP status 200:

• en: https://rs.school/docs/git-convention
• ru: https://rs.school/ru/docs/git-convention)

git commit -m "docs: fixed the broken link" (PR #1931)

- [Use commit names according to the guideline [EN]](https://rs.school/docs/git-convention) / [RU](https://rs.school/ru/docs/git-convention)

[ales1sobol]

git commit -m "docs: fixed the broken link" (PR #1931)
@pavelhalanin - Present tense ("add feature" not "added feature") should be used.