Move Windows CI to the windows-2025-vs2026 runner

.github/workflows/breakage-against-windows-ponyc-latest.yml

@@ -10,7 +10,7 @@ permissions:
 jobs:
   windows-vs-ponyc-latest:
     name: Test against recent ponyc release on Windows
-    runs-on: windows-2025
+    runs-on: windows-2025-vs2026
     steps:
       - name: Disable Windows Defender
         run: Set-MpPreference -DisableRealtimeMonitoring $true

.github/workflows/lint-action-workflows.yml

@@ -17,6 +17,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v6.0.2
       - name: Check workflow files
-        uses: docker://ghcr.io/ponylang/shared-docker-ci-actionlint:20260311
+        uses: docker://ghcr.io/ponylang/shared-docker-ci-actionlint:20260529
         with:
           args: -color

.github/workflows/pr.yml

@@ -59,7 +59,7 @@ jobs:
 
   windows-x86-64-vs-ponyc-release:
     name: Windows x86-64 with most recent ponyc release
-    runs-on: windows-2025
+    runs-on: windows-2025-vs2026
     steps:
       - name: Disable Windows Defender
         run: Set-MpPreference -DisableRealtimeMonitoring $true