docs: fix open an issue link on installation page

[kethan1]

🔗 Linked issue

There is no open issue as this pull request just fixes an incorrect link in the docs.

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

The "open and issue" link on the installation page points to the Nuxt image repo instead of the Nuxt fonts repo. This PR fixes that.

[danielroe]

Thank you! ❤️