ci.yml: add windows-11-arm

Author: greenrobot

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest, macos-latest, macos-26, windows-latest ]
+        os: [ ubuntu-latest, macos-latest, macos-26, windows-latest, windows-11-arm ]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -29,7 +29,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest, macos-latest, macos-26, windows-latest ]
+        os: [ ubuntu-latest, macos-latest, macos-26, windows-latest, windows-11-arm ]
     steps:
       - name: Checkout
         uses: actions/checkout@v4