[I10n] Improve Norwegian (nb-NO) locale

[JosteinBrevik]

• I have followed (at least) the PR section of the contributing guide.

[mui-bot]

Localization writing tips ✍️

Seems you are updating localization 🌍 files.

Thank you for contributing to the localization! 🎉 To make your PR perfect, here is a list of elements to check: ✔️

• Verify if the PR title respects the release format. Here are two examples (depending if you update or add a locale file)

  [l10n] Improve Swedish (sv-SE) locale
  [l10n] Add Danish (da-DK) locale

• Update the documentation of supported locales by running yarn l10n
• Clean files with yarn prettier.

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Netlify deploy preview: https://deploy-preview-9608--material-ui-x.netlify.app/

Updated pages

No updates.

These are the results for the performance tests:

Test case	Unit	Min	Max	Median	Mean	σ
Filter 100k rows	ms	311.1	498.7	382.8	385.72	70.614
Sort 100k rows	ms	515.1	807.4	796.7	709.22	118.995
Select 100k rows	ms	189.4	302.3	206	220.04	42.068
Deselect 100k rows	ms	124.9	288.7	216.4	224.9	60.012

Generated by 🚫 dangerJS against 5b80777

[LukasTy]

Thank you for your contribution! 🙏
Please follow the tips in #9608 (comment) to make the CI green. 👌

[JosteinBrevik]

There it is! Thanks for the help and sorry for the spam :)