Fix launch of qmk_driver_installer on msys2

util/win_shared_install.sh

@@ -35,7 +35,8 @@ function install_utils {
 
 function install_drivers {
     pushd $download_dir
-    cmd.exe /C qmk_driver_installer.exe $1 $2 ../drivers.txt
+    echo 
+    cmd.exe /c "qmk_driver_installer.exe $1 $2 ..\\drivers.txt"
     popd > /dev/null
 }