[ci] Validate Windows arm64

And not windows amd64...

Author: serge-sans-paille

.github/workflows/windows.yml

@@ -102,7 +102,7 @@ jobs:
     - name: Setup compiler
       uses: ilammy/msvc-dev-cmd@v1
       with:
-        arch: amd64
+        arch: amd64_arm
     - name: Setup Ninja
       run: |
         python3 -m pip install --upgrade pip setuptools wheel