Use windows-2025-vs2026 runners

Pin the Windows CI and release jobs to the hosted image requested by GitHub instead of using windows-latest or windows-2022.

Author: tobitege

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ on:
 
 jobs:
   build:
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     steps:
       - uses: actions/checkout@v6
 

.github/workflows/release.yml

@@ -39,7 +39,7 @@ jobs:
 
   build-desktop:
     needs: validate
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     permissions:
       contents: read