[Workflow] Fix Windows runner version (#105)

Author: HPDell

.github/workflows/cmake.yml

@@ -51,7 +51,7 @@ jobs:
           cmake --build build/CMakeFind
 
   windows-test:
-    runs-on: windows-2019
+    runs-on: windows-latest
     env: 
       USERNAME: GWmodel-Lab
       FEED_URL: https://nuget.pkg.github.com/GWmodel-Lab/index.json

.github/workflows/main.yml

@@ -43,7 +43,7 @@ jobs:
           ctest --test-dir build --output-on-failure
 
   windows-test:
-    runs-on: windows-2019
+    runs-on: windows-latest
     strategy:
       matrix:
         openmp: [TRUE, FALSE]