Auto dependencies upgrade by bot.

[NugetNinja]

Auto dependencies upgrade by bot. This is automatically generated by bot.

The bot tries to fetch all possible updates and modify the project files automatically.

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[what-the-diff]

PR Summary

• Update of testing framework in a critical part of the project
  The version of xunit, our tool used for running tests in the InfiniteEnumFlagsTests project, has been updated from 2.5.2 to 2.5.3. This allows us to take advantage of any enhancements brought by the new version, which may include improved performance, better error reporting, or additional features. Rest assured, the upgrade ensures that our testing remains current and effective.