Updated the Windows CI workflow to run gvsbuild against Visual Studio 2019 to match the runner’s installed toolchain.

.github/workflows/windows-build.yml

@@ -76,7 +76,7 @@ jobs:
           python -m pip install C:\gtk-build\github\gvsbuild
 
           $gvsPlatform = if ("${{ matrix.platform }}" -eq "win32") { "x86" } else { "x64" }
-          gvsbuild build --vs-ver vs2022 --configuration release --platform $gvsPlatform gtk3
+          gvsbuild build --vs-ver vs2019 --configuration release --platform $gvsPlatform gtk3
 
           if ($gvsPlatform -eq "x86") {
             $gtkRoot = "C:\gtk-build\gtk"