Update workflows/build.yml Set windows job container as windows-2019 instead of windows-latest which now run on windows-2022

actions/runner-images#4856
Fixes windows build

Author: s1lentq

.github/workflows/build.yml

@@ -14,7 +14,7 @@ on:
 jobs:
   windows:
     name: 'Windows'
-    runs-on: windows-latest
+    runs-on: windows-2019
 
     env:
       solution: 'msvc/reapi.sln'