hack/openbsd: use cdn.openbsd.org for PKG_PATH

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

Author: crazy-max

hack/Vagrantfile.openbsd

@@ -3,15 +3,15 @@
 
 Vagrant.configure("2") do |config|
   config.vm.box = "pygolo/openbsd7"
-  config.vm.box_version = "7.5"
+  config.vm.box_version = "7.7"
   config.vm.boot_timeout = 900
   config.vm.synced_folder ".", "/vagrant", type: "rsync"
   config.ssh.keep_alive = true
 
   config.vm.provision "init", type: "shell", run: "once" do |sh|
     sh.inline = <<~SHELL
       set -ex
-      export PKG_PATH=https://mirrors.ocf.berkeley.edu/pub/OpenBSD/7.5/packages/amd64/
+      export PKG_PATH=https://cdn.openbsd.org/pub/OpenBSD/$(uname -r)/packages/$(machine -a)/
       pkg_add -x git
 
       ftp https://go.dev/dl/go#{ENV['GO_VERSION']}.openbsd-amd64.tar.gz