ci: pin windows runner (#237)

Author: Wenzel

.github/workflows/ci.yml

@@ -536,7 +536,7 @@ jobs:
 
   build_windows:
     name: Build and Test (Windows)
-    runs-on: windows-latest
+    runs-on: windows-2022
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1