LICENSE: update copyright year

[swharden]

Commits to this repository have been made in 2024, but present copyright date range ends at 2023. This PR updates the date range to include the current year.

Should the copyright date range be removed to prevent this file requiring yearly modification in the future?

• Microsoft licenses on GitHub omit dates in their copyright notices (e.g., https://github.com/dotnet/runtime/blob/main/LICENSE.TXT)
• In contrast, GitHub's "new project" web interface adds the date into new licenses by default.
• This topic is not addressed on https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/licensing-a-repository but perhaps it should be. It would be fantastic to get input from someone who is an expert in this topic!

[srbaeza-ai]

https://github.com/dotnet/runtime/commit/381372f6f12884caee5bb90f52649040827e19cc

[swharden]

dotnet/runtime@381372f

Hi @srbaeza-ai, thanks for the added context. Clarifying for other readers, that link is to the initial commit for the dotnet runtime repository (dated Nov, 2019) where the MIT license file (which does not contain a date in the copyright) was first added to the repository.