fix(CI): Install winget manually on arm64

Author: hmelder

.github/workflows/ci.yml

@@ -43,6 +43,10 @@ jobs:
         # so we delete everything that could mess up our builds
         run: rmdir /S /Q C:\Strawberry
 
+      - name: Install Winget
+        if: contains(matrix.arch, 'arm64')
+        run: Add-AppxPackage -RegisterByFamilyName -MainPackage Microsoft.DesktopAppInstaller_8wekyb3d8bbwe
+
       - name: Install Windows packages
         run: winget install Ninja-build.Ninja NASM