Explicitly use Windows 2019 virtual environment as either TOX or Cargo seem to have trouble finding the MSVC linker in the 2022 version.

Author: adamreichold

.github/workflows/ci.yml

@@ -35,8 +35,8 @@ jobs:
         platform: [
           { os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu" },
           { os: "macOS-latest",   python-architecture: "x64", rust-target: "x86_64-apple-darwin" },
-          { os: "windows-latest", python-architecture: "x64", rust-target: "x86_64-pc-windows-msvc" },
-          { os: "windows-latest", python-architecture: "x86", rust-target: "i686-pc-windows-msvc" },
+          { os: "windows-2019", python-architecture: "x64", rust-target: "x86_64-pc-windows-msvc" },
+          { os: "windows-2019", python-architecture: "x86", rust-target: "i686-pc-windows-msvc" },
         ]
         include:
           # NumPy does not provide pre-built wheels for PyPy on macOS and Windows