fix: respect detectBrowserLanguage: false in SSG plugin

[ap-arto]

Do not call detectBrowserLanguage when options.detectBrowserLanguage is set to false

🔗 Linked issue

#3407

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ 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

i18n:plugin:ssg-detect doesn't respect nuxtI18nOptions.detectBrowserLanguage and calls detectBrowserLanguage() regardless if that option is set to false.
And it causes an issue: when we use strategy: 'no_prefix' and differentDomains: true alongside with detectBrowserLanguage: false, locale messages are not being loaded.

📝 Checklist

• I have linked an issue or discussion.
• I have added tests (if possible).
• I have updated the documentation accordingly.

[BobbieGoede]

Thank you for contributing! 🙏