Github workflow use windows-2019 virtual environment

.github/workflows/cmake-windows.yml

@@ -1,6 +1,6 @@
 name: CMake Windows
 
-# Controls when the action will run. 
+# Controls when the action will run.
 on:
   # Triggers the workflow on push or pull request events but only for the master branch
   push:
@@ -18,7 +18,7 @@ jobs:
         config:
         - {
             name: "Windows Latest MSVC", artifact: "Windows-MSVC.tar.xz",
-            os: windows-latest,
+            os: windows-2019,
             build_type: "Release", cc: "cl", cxx: "cl",
             environment_script: "C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/VC/Auxiliary/Build/vcvars64.bat"
           }
@@ -48,7 +48,7 @@ jobs:
       run: |
         set(ninja_version "1.9.0")
         set(cmake_version "3.16.2")
-        
+
         message(STATUS "Using host CMake version: ${CMAKE_VERSION}")
 
         if ("${{ runner.os }}" STREQUAL "Windows")