[ci] Fix window version to 2022

flutter engine's window build uses Window SDKs 10.0.22621.0. window-2025 runner in gitHub actions no longer supports the 10.0.22621.0 SDK.

Author: JSUYA

.github/workflows/build.yml

@@ -142,7 +142,7 @@ jobs:
           if-no-files-found: error
 
   windows-build:
-    runs-on: windows-latest
+    runs-on: windows-2022
 
     strategy:
       matrix: