Update windows runners to visual studio 2026

Maybe this fixes current build issues...

.github/workflows/llvm.yml

@@ -17,7 +17,7 @@ jobs:
   Windows_Build:
     if: github.event_name == 'workflow_dispatch'
     name: LLVM Windows (MSVC)
-    runs-on: windows-2025
+    runs-on: windows-2025-vs2026
     env:
       COMPILER: msvc
       CCACHE_SHA: '859141059ac950e1e8cd042c66f842f26b9e3a62a1669a69fe6ba180cb58bbdf'

.github/workflows/rpcs3.yml

@@ -209,7 +209,7 @@ jobs:
     # Only run push event on master branch of main repo, but run all PRs
     if: github.event_name != 'push' || (github.repository == 'RPCS3/rpcs3' && github.ref_name == 'master')
     name: RPCS3 Windows
-    runs-on: windows-2025
+    runs-on: windows-2025-vs2026
     env:
       COMPILER: msvc
       QT_VER_MAIN: '6'