Fix Vagrant failure to sync dangling symlinks (mastodon#28101)

Co-authored-by: Filippo Giunchedi <[email protected]>

Author: filippog

Vagrantfile

@@ -174,7 +174,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   if config.vm.networks.any? { |type, options| type == :private_network }
     config.vm.synced_folder ".", "/vagrant", type: "nfs", mount_options: ['rw', 'actimeo=1']
   else
-    config.vm.synced_folder ".", "/vagrant"
+    config.vm.synced_folder ".", "/vagrant", type: "rsync", create: true, rsync__args: ["--verbose", "--archive", "--delete", "-z"]
   end
 
   # Otherwise, you can access the site at http://localhost:3000 and http://localhost:4000 , http://localhost:8080