Imminent removal of Windows runner used by "build" workflow

[per1234]

Bug Report

Current behavior

This repository contains a GitHub Actions workflow which builds the Arduino Language Server to provide a "smoke test" and facilitate testing of pull requests and to produce nightly builds:

https://github.com/arduino/arduino-language-server/blob/main/.github/workflows/build.yml

This workflow runs jobs on Linux, macOS, and Windows machines ("runners").

The Windows runner version used is windows-2016. GitHub plans to remove this version on 2022-06-30:

actions/runner-images#5403

They are also performing intentional brownouts of the runner to encourage migration to the newer runner versions.

The original removal date was 2022-04-01 (actions/runner-images#4312). Despite the claim of a respite, none of the workflow runs since that time have passed:

https://github.com/arduino/arduino-language-server/actions/workflows/build.yml?query=is%3Asuccess

Expected behavior

"build" workflow uses a reliable Windows runner version.