Revert "Upgrade GHA Windows runner"

No disk space in the runner to build the docker image.

This reverts commit aa3a08d.

Author: asfernandes

.github/workflows/main.yml

@@ -283,7 +283,7 @@ jobs:
             builds/install_images/Firebird-*-windows-arm64*.zip
 
   build-windows-docker:
-    runs-on: windows-2025
+    runs-on: windows-2022
 
     strategy:
       fail-fast: false