Upgrade the Qt action to Windows Server 2025

Author: Dadoum

.github/workflows/build-qt.yml

@@ -245,7 +245,7 @@ jobs:
             ${{github.workspace}}/Sideloader-qt.app.tgz
 
   build-windows-x86_64:
-    runs-on: windows-2019
+    runs-on: windows-2025
 
     steps:
       - uses: actions/checkout@v3