Add norwegian translation to SEO plugin

[Snailedlt]

Description

Simply adds Norwegian translations for the SEO plugin

• I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• Chore (non-breaking change which does not add functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Change to the templates directory (does not affect core functionality)
• Change to the examples directory (does not affect core functionality)
• This change requires a documentation update

Checklist:

• I have added tests that prove my fix is effective or that my feature works
• Existing test suite passes locally with my changes
• I have made corresponding changes to the documentation

[jacobsfletch]

Thanks @Snailedlt! We've got this merged into alpha already as well. This will ensure that it makes it to 3.0 without regression.