Changes

• Update readme.md file, reference newest runner versions
• Mark Windows Server 2019 as deprecated

Context

From the GitHub Blog, Windows Server 2019 is closing down:

We’re beginning the process of closing down the Windows server 2019 hosted runner image, following our N-1 OS support policy. This image will be fully retired by June 30, 2025. We recommend updating workflows use windows-2022 or windows-2025.

To raise awareness of the upcoming removal, we’ll temporarily fail jobs using the windows-2019 label starting in June 2025. The brownouts will occur on the following dates and times:

• June 3 13:00 – 21:00 UTC
• June 10 13:00-21:00 UTC
• June 17 13:00-21:00 UTC
• June 24 13:00-21:00 UTC

Documentation (please check one with an [x])

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I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
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• Both unit tests + ran on a real repository